# Liste des espèces du genre Begonia

Le genre Begonia, famille des Begoniaceae, comprend plus de 1500 espèces botaniques (en mai 2018 on en comptait 1870) auxquelles il convient d'ajouter les hybrides naturels.
Depuis plusieurs siècles, d'abord en Europe, puis en Amérique du Nord et ailleurs, de nombreux bégonias sont cultivés et croisés par les horticulteurs. C'est donc à la suite d'innombrables essais qu'ont été obtenus les nombreux cultivars répertoriés, collectionnés ou commercialisés dans les jardineries du monde entier.
Pour une classification sur des critères d'horticulture, voir la Catégorie:Bégonia par groupe horticole.
Pour une classification scientifique par sections, voir la Catégorie:Espèce de Begonia par section.

## Variabilité des bégonias

Les bégonias s'hybrident avec facilité dans la nature, par conséquent il est difficile de les identifier les uns des autres uniquement sur des critères morphologiques. Au XXIe siècle, on s'appuie également sur des analyses d'ADN et des expérimentations pour déterminer s'il s'agit d'espèces à part entière ou bien d'hybrides.
Par conséquent le nombre d'espèces valides dans le genre Begonia évolue encore constamment. Soit au gré des découvertes de nouveaux spécimens types au cours des expéditions de terrain, soit à la faveur des progrès de la recherche. Les botanistes peuvent désormais plus facilement repérer des espèces distinctes là où leurs prédécesseurs n'en avaient décrit qu'une seule, ou au contraire mettre en évidence une hybridation.
Cette liste n'a donc qu'une validité provisoire, alors même que de nombreux bégonias encore inconnus sont en danger de disparition dans leur habitat naturel. Citons par exemple le minuscule tubéreux Begonia elachista Moonlight & Tebbitt, décrit en 2017 et en danger critique d'extinction selon l'UICN.

## Liste d'espèces

Selon World Checklist of Selected Plant Families (WCSP) (18 juillet 2018) :
* Haut – A
* B
* C
* D
* E
* F
* G
* H
* I
* J
* K
* L
* M
* N
* O
* P
* Q
* R
* S
* T
* U
* V
* W
* X
* Y
* Z

### A

* B. ampla
* Begonia acetosa
* Begonia abbottii Urb. (1922)
* Begonia abbreviata C.I Peng (2015)
* Begonia abdullahpieei Kiew (2005)
* Begonia aberrans Irmsch. (1954)
* Begonia aborensis Dunn (1920)
* Begonia acaulis Merr. & L.M.Perry (1943)
* Begonia acclivis Coyle (2010)
* Begonia acerifolia Kunth (1825)
* Begonia aceroides Irmsch. (1953)
* Begonia acetosa Vell. (1831)
* Begonia acetosella Craib (1912)
* Begonia acida Vell. (1831)
* Begonia acidulenta S.Julia & Kiew (2016)
* Begonia aconitifolia A.DC. (1859)
* Begonia acuminatissima Merr. (1911 publ. 1912)
* Begonia acutifolia Jacq. (1787)
* Begonia acutiloba Liebm. (1852)
* Begonia acutitepala K.Y.Guan & D.K.Tian (2000)
* Begonia addrinii S.Julia & Kiew (2016)
* Begonia adenodes Irmsch. (1954)
* Begonia adenopoda Lem. (1857)
* Begonia adenostegia Stapf (1894)
* Begonia adliniana Rimi (2015)
* Begonia admirabilis Brade (1950)
* Begonia adpressa Sosef (1991 publ. 1992)
* Begonia adscendens C.B.Clarke (1889)
* Begonia aenea Linden & André (1871)
* Begonia aequata A.Gray (1854)
* Begonia aequatoguineensis Sosef & Nguema (2010)
* Begonia aequatorialis L.B.Sm. & B.G.Schub. (1950)
* Begonia aequilateralis Irmsch. (1929)
* Begonia aeranthos L.B.Sm. & B.G.Schub. (1952)
* Begonia affinis Merr. (1912)
* Begonia afromigrata J.J.de Wilde (2011)
* Begonia aggeloptera N.Hallé (1972)
* Begonia aguabuenensis Burt-Utley & Utley (2012)
* Begonia aguiabrancensis L.Kollmann (2008)
* Begonia agusanensis Merr. (1911 publ. 1912)
* Begonia aiensis C.W.Lin & C.I Peng (2017)
* Begonia aketajawensis Ardi & D.C.Thomas (2014)
* Begonia alabensis Kiew (2015)
* Begonia alba Merr. (1915)
* Begonia albidula Brade (1950)
* Begonia albobracteata Ridl. (1916)
* Begonia albococcinea Hook. (1845)
* Begonia albomaculata C.DC. ex Huber (1906)
* Begonia ×albopicta W.Bull (1885)
* Begonia alcarrasica J.Sierra (1989)
* Begonia alchemilloides A.DC. (1859)
* Begonia algaia L.B.Sm. & Wassh. (1983)
* Begonia alice-clarkae Ziesenh. (1976)
* Begonia alicida C.B.Clarke (1879)
* Begonia almedana Burt-Utley & Utley (1999)
* Begonia alnifolia A.DC. (1859)
* Begonia alpina L.B.Sm. & Wassh. (1984)
* Begonia alta Aver. (2012)
* Begonia altamiroi Brade (1948)
* Begonia altissima Ridl. (1917)
* Begonia altoperuviana A.DC. (1859)
* Begonia alvarezii Merr. (1911 publ. 1912)
* Begonia alveolata T.T.Yu (1948)
* Begonia ×amabilis Linden (1859)
* Begonia amidalae C.W.Lin & C.I Peng (2014)
* Begonia amphioxus Sands (1990)
* Begonia ampla Hook.f. (1871)
* Begonia anaimalaiensis Bedd. (1864)
* Begonia andamensis Parish ex C.B.Clarke (1879)
* Begonia andersonii Kiew & S.Julia (2007)
* Begonia andina Rusby (1912)
* Begonia androrangensis Humbert (1972)
* Begonia androturba Coyle (2009)
* Begonia anemoniflora Irmsch. (1953)
* Begonia angilogensis Merr. (1925)
* Begonia angolensis Irmsch. (1961)
* Begonia angraensis Brade (1943)
* Begonia angularis Raddi (1820)
* Begonia angulata Vell. (1831)
* Begonia angustilimba Merr. (1922)
* Begonia angustiloba A.DC. (1859)
* Begonia anisoptera Merr. (1911 publ. 1912)
* Begonia anisosepala Hook.f. (1871)
* Begonia anjuanensis Humbert ex Aymonin & Bosser (1971 publ. 1973)
* Begonia ankaranensis Humbert ex Aymonin & Bosser (1971 publ. 1973)
* Begonia annobonensis A.DC. (1859)
* Begonia annulata K.Koch (1857)
* Begonia anodifolia A.DC. (1859)
* Begonia anserina C.W.Lin & C.I Peng (2014)
* Begonia antaisaka Humbert (1972)
* Begonia anthonyi Kiew (2001)
* Begonia antongilensis Humbert (1972)
* Begonia ×antonietae Brade (1957)
* Begonia antsingyensis Humbert ex Aymonin & Bosser (1971 publ. 1973)
* Begonia antsiranensis Aymonin & Bosser (1983)
* Begonia apayaoensis Merr. (1918)
* Begonia apiensis Kiew & S.Julia (2013)
* Begonia apparicioi Brade (1948)
* Begonia aptera Blume (1827)
* Begonia arachnoidea C.I Peng, Yan Liu & S.M.Ku (2008)
* Begonia arborescens Raddi (1820)
* Begonia arboreta Y.M.Shui (2002)
* Begonia archboldiana Merr. & L.M.Perry (1943)
* Begonia areolata Miq. (1855)
* Begonia arfakensis (Gibbs) L.L.Forrest & Hollingsw. (2003)
* Begonia argentea Linden (1859)
* Begonia argenteomarginata Tebbitt (2004 publ. 2005)
* Begonia aridicaulis Ziesenh. (1952)
* Begonia armykapii S.Julia & C.Y.Ling (2016)
* Begonia arnottiana (Wight) A.DC. (1864)
* Begonia arrogans Irmsch. (1949)
* Begonia articulata Irmsch. (1954)
* Begonia artior Irmsch. (1954)
* Begonia asperifolia Irmsch. (1927)
* Begonia aspleniifolia Hook.f. ex A.DC. (1864)
* Begonia assurgens Irmsch. ex Weberling (1963)
* Begonia asteroides L.B.Sm. & B.G.Schub. (1939)
* Begonia asteropyrifolia Y.M.Shui & W.H.Chen (2005)
* Begonia atricha (Miq.) Miq. ex A.DC. (1864)
* Begonia atroglandulosa Sosef (1991 publ. 1992)
* Begonia augustae Irmsch. (1913)
* Begonia augustinei Hemsl. (1900)
* Begonia aurantiiflora C.I Peng, Yan Liu & S.M.Ku (2008)
* Begonia auriculata Hook.f. (1871)
* Begonia auritistipula Y.M.Shui & W.H.Chen (2005)
* Begonia austroguangxiensis Y.M.Shui & W.H.Chen (2005)
* Begonia austrotaiwanensis Y.K.Chen & C.I.Peng (1990)
* Begonia awongii Sands (1996 publ. 1997)
* Begonia axillaris Ridl. (1906)
* Begonia axillipara Ridl. (1916)
* Begonia azuensis Urb. & Ekman (1930)

### B

* Begonia baccata
* Begonia banaoensis
* Begonia boliviensis
* Begonia brevirimosa
* Begonia blancii
* Begonia babeana Aver. & H.Q.Nguyen (2012)
* Begonia baccata Hook.f. (1866)
* Begonia bagotiana Humbert ex Aymonin & Bosser (1971 publ. 1973)
* Begonia bahakensis Sands (1996 publ. 1997)
* Begonia bahiensis A.DC. (1859)
* Begonia baik C.W.Lin & C.I Peng (2014)
* Begonia baikoides S.Julia & C.Y.Ling (2016)
* Begonia bakunensis S.Julia (2015)
* Begonia balansae C.DC. (1903)
* Begonia balansana Gagnep. (1919)
* Begonia baliensis Girm. (2009)
* Begonia balmisiana Balmis (1794)
* Begonia bamaensis Yan Liu & C.I Peng (2007)
* Begonia banaoensis J.Sierra (1989)
* Begonia bangii Kuntze (1898)
* Begonia barahonensis (O.E.Schulz) Urb. (1922)
* Begonia baramensis Merr. (1928)
* Begonia barbellata Ridl. (1920)
* Begonia barkeri Knowles & Westc. (1840)
* Begonia barkleyana L.B.Sm. (1973)
* Begonia baronii Baker (1887)
* Begonia barrigae L.B.Sm. & B.G.Schub. (1946)
* Begonia bartlettiana Merr. & L.M.Perry (1948)
* Begonia basintaliana Rimi (2015)
* Begonia bataiensis Kiew (2005)
* Begonia baturongensis Kiew (2001)
* Begonia baumannii Lemoine ex Wittm. (1891)
* Begonia baviensis Gagnep. (1919)
* Begonia bayae S.Julia & Kiew (2016)
* Begonia beccariana Ridl. (1923)
* Begonia beccarii Warb. (1922)
* Begonia beddomei Hook.f. (1884)
* Begonia bekopakensis Aymonin & Bosser (1983)
* Begonia belagaensis S.Julia (2015)
* Begonia bella Phutthai (2012)
* Begonia beludruvenea M.Hughes (2015)
* Begonia benaratensis S.Julia (2013)
* Begonia bengohensis S.Julia (2015)
* Begonia bequaertii Robyns & Lawalrée (1947)
* Begonia berhamanii Kiew (2001)
* Begonia bernadusii Guanih (2015)
* Begonia bernicei Aymard & G.A.Romero (2011)
* Begonia bernieri A.DC. (1859)
* Begonia beryllae Ridl. (1915)
* Begonia besleriifolia Schott (1827)
* Begonia betsimisaraka Humbert (1972)
* Begonia bettinae Ziesenh. (1965)
* Begonia bidentata Raddi (1820)
* Begonia biflora T.C.Ku (1997)
* Begonia bifolia Ridl. (1917)
* Begonia bifurcata L.B.Sm. & B.G.Schub. (1955)
* Begonia biguassuensis Brade (1954)
* Begonia biliranensis Merr. (1915)
* Begonia bimaensis Undaharta & Ardaka (2015)
* Begonia bintang Rimi (2015)
* Begonia binuangensis Merr. (1918)
* Begonia bipinnatifida J.J.Sm. (1906)
* Begonia biserrata Lindl. (1847)
* Begonia bissei J.Sierra (1989)
* Begonia blancii M.Hughes & C.I Peng (2011)
* Begonia bogneri Ziesenh. (1973)
* Begonia boisiana Gagnep. (1919)
* Begonia boissieri A.DC. (1859)
* Begonia boiviniana A.DC. (1859)
* Begonia boliviensis A.DC. (1859)
* Begonia bolleana Urb. & Ekman (1930)
* Begonia bolsteri Merr. (1911 publ. 1912)
* Begonia bonii Gagnep. (1919)
* Begonia bonitoensis Brade (1945)
* Begonia bonthainensis Hemsl. (1896)
* Begonia bonus-henricus J.J.de Wilde (1980)
* Begonia boqueronensis Burt-Utley & Utley (2014)
* Begonia boraceiensis Handro (1968)
* Begonia boreoharlingii Moonlight & Tebbitt (2017)
* Begonia borneensis A.DC. (1859)
* Begonia bosseri Keraudren (1983)
* Begonia bosuangiana S.Julia (2015)
* Begonia botryoides Moonlight & Tebbitt (2017)
* Begonia boucheana (Klotzsch) A.DC. (1864)
* Begonia bouffordii C.I Peng (2005)
* Begonia bowerae Ziesenh. (1950)
* Begonia brachybotrys Merr. & L.M.Perry (1943)
* Begonia brachyclada Urb. & Ekman (1930)
* Begonia brachypoda O.E.Schulz (1911)
* Begonia bracteata Jack (1822)
* Begonia bracteosa A.DC. (1859)
* Begonia bradei Irmsch. (1953)
* Begonia brandbygeana L.B.Sm. & Wassh. (1986)
* Begonia brandisiana Kurz, J. (1871)
* Begonia brangbosangensis Girm. (2016)
* Begonia brassii Merr. & L.M.Perry (1943)
* Begonia breedlovei Burt-Utley (1986)
* Begonia brevibracteata Kupicha (1978)
* Begonia brevicaulis A.DC. (1859)
* Begonia brevicordata L.B.Sm. & B.G.Schub. (1953)
* Begonia brevilobata Irmsch. (1953)
* Begonia brevipedunculata Y.M.Shui (2006)
* Begonia brevipes Merr. (1911 publ. 1912)
* Begonia brevipetala (A.DC.) Warb. (1894)
* Begonia brevirimosa Irmsch. (1913)
* Begonia ×breviscapa C.I Peng, Yan Liu & S.M.Ku (2010)
* Begonia brevisetulosa C.Y.Wu (1995)
* Begonia bridgesii A.DC. (1859)
* Begonia bruneiana Sands (1996 publ. 1997)
* Begonia buchtienii Irmsch. (1949)
* Begonia buddleiifolia A.DC. (1859)
* Begonia bufoderma L.B.Sm. & Wassh. (1983)
* Begonia buimontana Yamam. (1933)
* Begonia bulbillifera Link & Otto (1831)
* Begonia bullata Urb. & Ekman (1930)
* Begonia bullatifolia L.Kollmann (2009)
* Begonia burbidgei Stapf (1894)
* Begonia burkillii Dunn (1920)
* Begonia burmensis L.B.Sm. & Wassh. (1983)
* Begonia burttii Kiew & S.Julia (2007)
* Begonia buseyi Burt-Utley (1982)

### C

* Begonia capensis
* Begonia cardiocarpa
* Begonia cinnabarina
* Begonia coccinea
* Begonia conchifolia
* Begonia cacauicola L.B.Sm. ex S.F.Sm. & Wassh. (1999)
* Begonia caespitosa Jack (1822)
* Begonia calcarea Ridl. (1906)
* Begonia calcicola Merr. (1911 publ. 1912)
* Begonia calciphila C.I Peng (2015)
* Begonia calderonii Standl. (1930)
* Begonia calliantha Merr. & L.M.Perry (1943)
* Begonia callosa L.Kollmann (2007)
* Begonia calvescens (Brade ex L.B.Sm. & R.C.Sm.) E.L.Jacques & Mamede (2004)
* Begonia calzadae Burt-Utley & Utley (2014)
* Begonia campanensis Burt-Utley & Utley (2011)
* Begonia camposportoana Brade (1954)
* Begonia canarana Miq. (1853)
* Begonia candollei Ziesenh. (1969)
* Begonia caobangensis C.I Peng & C.W.Lin (2015)
* Begonia capanemae Brade (1954)
* Begonia caparaoensis E.L.Jacques & L.Kollmann (2009)
* Begonia capensis L.f. (1782)
* Begonia capillipes Gilg (1904)
* Begonia capituliformis Irmsch. (1913)
* Begonia caraguatatubensis Brade (1954)
* Begonia cardiocarpa Liebm. (1852)
* Begonia cardiophora Irmsch. (1929)
* Begonia cariocana Brade ex L.B.Sm. & Wassh. (1983)
* Begonia carletonii Standl. (1927)
* Begonia carnosa (Teijsm. & Binn.) Teijsm. & Binn. (1863)
* Begonia carnosula Ridl. (1909)
* Begonia carolineifolia Regel (1852)
* Begonia carpinifolia Liebm. (1852)
* Begonia carrieae Ziesenh. (1976)
* Begonia casiguranensis Quisumb. & Merr. (1928)
* Begonia castaneifolia Otto & A.Dietr. (1836)
* Begonia castilloi Merr. (1918)
* Begonia catharinensis Brade (1945)
* Begonia cathayana Hemsl. (1908)
* Begonia cathcartii Hook.f. & Thomson (1855)
* Begonia caudata Merr. (1918)
* Begonia cauliflora Sands (1990)
* Begonia cavaleriei H.Lév. (1909)
* Begonia cavallyensis A.Chev. (1912)
* Begonia cavum Ziesenh. (1948)
* Begonia cebadillensis Houghton ex L.B.Sm. & B.G.Schub. (1946)
* Begonia cehengensis T.C.Ku (1995)
* Begonia celata S.Julia & Kiew (2016)
* Begonia celebica Irmsch. (1913)
* Begonia cerasiphylla L.B.Sm. & Wassh. (1983)
* Begonia ceratocarpa S.H.Huang & Y.M.Shui (1999)
* Begonia chaetocarpa Kuntze (1898)
* Begonia chaiana Kiew & S.Julia (2007)
* Begonia chakensis S.Julia & C.Y.Ling (2015)
* Begonia chambersiae W.N.Takeuchi (2012)
* Begonia chemillenensis Moonlight (2017)
* Begonia chiapensis Burt-Utley (1986)
* Begonia chiasmogyna M.Hughes (2006)
* Begonia chingii Irmsch. (1939)
* Begonia chingipengii Rubite (2014)
* Begonia chishuiensis T.C.Ku (1995)
* Begonia chitoensis Tang S.Liu & M.J.Lai (1977)
* Begonia chivatoa Ziesenh. (1950)
* Begonia chlorandra Sands (1996 publ. 1997)
* Begonia chlorocarpa Irmsch. ex Sands (2001)
* Begonia chlorolepis L.B.Sm. & B.G.Schub. (1946)
* Begonia chloroneura P.Wilkie & Sands (1999)
* Begonia chlorosticta Sands (1981 publ. 1982)
* Begonia chongii Sands (2001)
* Begonia chongzuoensis Yan Liu, S.M.Ku & C.I Peng (2012)
* Begonia chrysantha Tebbitt (2015)
* Begonia ×chungii C.I Peng & S.M.Ku (2009)
* Begonia chuniana C.Y.Wu (1995)
* Begonia chuyunshanensis C.I Peng & Y.K.Chen (2005)
* Begonia ciliifera Merr. (1911 publ. 1912)
* Begonia ciliobracteata Warb. (1895)
* Begonia cincinnifera Irmsch. (1953 publ. 1954)
* Begonia cinnabarina Hook. (1849)
* Begonia circularis C.I Peng & C.W.Lin (2015)
* Begonia circumlobata Hance (1883)
* Begonia cirrosa L.B.Sm. & Wassh. (1983)
* Begonia cladocarpoides Humbert ex Aymonin & Bosser (1983)
* Begonia cladotricha M.Hughes (2007)
* Begonia clarkei Hook.f. (1867)
* Begonia clavicaulis Irmsch. (1939)
* Begonia clemensiae Merr. & L.M.Perry (1948)
* Begonia cleopatrae Coyle (2010)
* Begonia clypeifolia Hook.f. (1871)
* Begonia coccinea Hook. (1843)
* Begonia coelocentroides Y.M.Shui & Z.D.Wei (2007)
* Begonia cognata Irmsch. (1953 publ. 1954)
* Begonia collaris Brade (1944)
* Begonia collisiae Merr. (1919)
* Begonia colombiana L.B.Sm. & B.G.Schub. (1946)
* Begonia colorata Warb. (1904)
* Begonia comata Kuntze (1898)
* Begonia comestibilis D.C.Thomas & Ardi (2011)
* Begonia comorensis Warb. (1895)
* Begonia compacta S.Julia & Kiew (2016)
* Begonia concanensis A.DC. (1859)
* Begonia conchifolia A.Dietr. (1851)
* Begonia concinna Schott (1827)
* Begonia confinis L.B.Sm. & Wassh. (1983)
* Begonia confusa L.B.Sm. & B.G.Schub. (1946)
* Begonia congesta Ridl. (1906)
* Begonia conipila Irmsch. ex Kiew (2001)
* Begonia conniegeriae S.Julia & Kiew (2013)
* Begonia consanguinea Merr. (1928)
* Begonia consobrina Irmsch. (1937)
* Begonia contracta Warb. (1904)
* Begonia convallariodora C.DC. (1895)
* Begonia convolvulacea (Klotzsch) A.DC. (1861)
* Begonia cooperi C.DC. (1895)
* Begonia copelandii Merr. (1911 publ. 1912)
* Begonia copeyana C.DC. (1908)
* Begonia coptidifolia H.G.Ye, F.G.Wang, Y.S.Ye & C.I Peng (2004)
* Begonia coptidimontana C.Y.Wu (1995)
* Begonia cordata Vell. (1831)
* Begonia cordifolia (Wight) Thwaites (1859)
* Begonia coriacea Hassk. (1844)
* Begonia corneri Kiew (1991)
* Begonia cornitepala Irmsch. (1953)
* Begonia cornuta L.B.Sm. & B.G.Schub. (1946)
* Begonia coronensis Merr. (1925)
* Begonia corredorana C.DC. (1925)
* Begonia corrugata Kiew & S.Julia (2007)
* Begonia corzoensis Ziesenh. (1971)
* Begonia coursii Humbert ex Aymonin (1983)
* Begonia cowellii Nash (1916)
* Begonia crassa S.Julia & Kiew (2016)
* Begonia crassicaulis Lindl. (1842)
* Begonia crassula Aver. (2012)
* Begonia crateris Exell (1944)
* Begonia cremnophila Tebbitt (2013)
* Begonia crenata Dryand. (1791)
* Begonia crinita Oliv. ex Hook.f. (1871)
* Begonia crispipila Elmer (1910)
* Begonia crispula Brade (1950)
* Begonia cristobalensis Ziesenh. (1971)
* Begonia croatii Burt-Utley (1982)
* Begonia crocea C.I Peng (2006)
* Begonia crockerensis Rimi (2015)
* Begonia cryptocarpa L.B.Sm. & B.G.Schub. (1946)
* Begonia crystallina Y.M.Shui & W.H.Chen (2005)
* Begonia cuatrecasasiana L.B.Sm. & B.G.Schub. (1946)
* Begonia cubensis Hassk. (1858)
* Begonia cucphuongensis H.Q.Nguyen & Tebbitt (2005)
* Begonia cucullata Willd. (1805)
* Begonia cucurbitifolia C.Y.Wu (1995)
* Begonia cuernavacensis Ziesenh. (1959)
* Begonia culasiensis C.I Peng, Rubite, C.W.Lin & K.F.Chung (2017)
* Begonia cumingiana (Klotzsch) A.DC. (1864)
* Begonia cumingii A.Gray (1854)
* Begonia cuneatifolia Irmsch. (1913)
* Begonia cupreata Henriq. (1861)
* Begonia curtii L.B.Sm. & B.G.Schub. (1955)
* Begonia curvicarpa S.M.Ku, C.I Peng & Yan Liu (2004)
* Begonia cyanescens Sands (1996 publ. 1997)
* Begonia cyathophora Poepp. & Endl. (1835)
* Begonia cylindrata L.B.Sm. & B.G.Schub. (1939)
* Begonia cylindrica D.R.Liang & X.X.Chen (1993)
* Begonia cymbalifera L.B.Sm. & B.G.Schub. (1946)

### D

* Begonia decandra
* Begonia decora
* Begonia descoleana
* Begonia dietrichiana
* Begonia domingensis
* Begonia danumensis Chong (2015)
* Begonia darthvaderiana C.W.Lin & C.I Peng (2014)
* Begonia davisii Hook.f. (1876)
* Begonia daweishanensis S.H.Huang & Y.M.Shui (1994 publ. 1995)
* Begonia daxinensis T.C.Ku (1997)
* Begonia dealbata Liebm. (1852)
* Begonia debaoensis C.I Peng, Yan Liu & S.M.Ku (2006)
* Begonia decandra Pav. ex A.DC. (1859)
* Begonia decaryana Humbert ex Aymonin & Bosser (1971 publ. 1973)
* Begonia declinata Vell. (1831)
* Begonia decora Stapf (1892)
* Begonia delicata Gregório & J.A.S.Costa (2015)
* Begonia delicatula Parish ex C.B.Clarke (1879)
* Begonia demissa Craib (1930)
* Begonia densifolia Irmsch. (1953)
* Begonia densiretis Irmsch. (1953 publ. 1954)
* Begonia dentatiloba A.DC. (1859)
* Begonia dentatobracteata C.Y.Wu (1995)
* Begonia denticulata Kunth (1825)
* Begonia depauperata Schott (1827)
* Begonia descoleana L.B.Sm. & B.G.Schub. (1950)
* Begonia devexa S.Julia & Kiew (2016)
* Begonia dewildei Sosef (1991 publ. 1992)
* Begonia dichotoma Jacq. (1791)
* Begonia dicressine Wahlsteen (2019)
* Begonia didyma D.C.Thomas & Ardi (2009)
* Begonia dielsiana E.Pritz. ex Diels (1901)
* Begonia dietrichiana Irmsch. (1953)
* Begonia difformis (Irmsch.) W.C.Leong, C.I Peng & K.F.Chung (2015)
* Begonia diffusa L.B.Sm. & B.G.Schub. (1946)
* Begonia diffusiflora Merr. & L.M.Perry (1943)
* Begonia digitata Raddi (1820)
* Begonia digyna Irmsch. (1927)
* Begonia dioica Buch.-Ham. ex D.Don (1825)
* Begonia dimorpha S.Julia (2015)
* Begonia dinosauria C.W.Lin & C.I Peng (2017)
* Begonia dipetala Graham (1828)
* Begonia discrepans Irmsch. (1953)
* Begonia discreta Craib (1930)
* Begonia divaricata Irmsch. (1953 publ. 1954)
* Begonia divergens Kiew & S.Julia (2013)
* Begonia diversistipulata Irmsch. (1949)
* Begonia diwolii Kiew (2001)
* Begonia djamuensis Irmsch. (1913)
* Begonia dodsonii L.B.Sm. & Wassh. (1979)
* Begonia dolichobracteata Girm. (2015)
* Begonia dolichocarpa Girm. (2012)
* Begonia dolichotricha Merr. (1920 publ. 1921)
* Begonia doloisii Rimi (2015)
* Begonia domingensis A.DC. (1859)
* Begonia donkelaariana Lem. (1851)
* Begonia dosedlae Gilli (1979 publ. 1980)
* Begonia dregei Otto & A.Dietr. (1836)
* Begonia dressleri Burt-Utley (1982)
* Begonia droopiae Ardi (2010)
* Begonia dryadis Irmsch. (1951)
* Begonia duclouxii Gagnep. (1919)
* Begonia dugandiana L.B.Sm. & B.G.Schub. (1946)
* Begonia duncan-thomasii Sosef (1991 publ. 1992)
* Begonia dux C.B.Clarke (1879)

### E

* Begonia epipsila
* B. elaeagnifolia
* Begonia eberhardtii Gagnep. (1919)
* Begonia ebolowensis Engl. (1921)
* Begonia echinosepala Regel (1871)
* Begonia eciliata O.E.Schulz (1911)
* Begonia edanoi Merr. (1918)
* Begonia edgariana S.Julia & Kiew (2016)
* Begonia edmundoi Brade (1945)
* Begonia edulis H.Lév. (1909)
* Begonia egregia N.E.Br. (1887)
* Begonia eiromischa Ridl. (1917) †
* Begonia elachista Moonlight & Tebbitt (2017)
* Begonia elaeagnifolia Hook.f. (1871)
* Begonia elatostematoides Merr. (1912)
* Begonia elatostemma Ridl. (1906)
* Begonia elatostemmoides Hook.f. (1871)
* Begonia elianeae Gregório & J.A.S.Costa (2015)
* Begonia eliassii Warb. (1891)
* Begonia elisabethae Kiew (2005)
* Begonia elmeri Merr. (1918)
* Begonia emeiensis C.M.Hu (1995)
* Begonia eminii Warb. (1894)
* Begonia engleri Gilg (1904)
* Begonia epibaterium Mart. ex A.DC. (1861)
* Begonia epipsila Brade (1948)
* Begonia erecta Vell. (1831)
* Begonia erectocaulis Sosef (1991 publ. 1992)
* Begonia erectotricha Sosef (1991 publ. 1992)
* Begonia erminea L'Hér. (1788)
* Begonia erythrogyna Sands (1990)
* Begonia erythrothrix Tebbitt & Moonlight (2017 publ. 2016)
* Begonia esculenta Merr. (1911 publ. 1912)
* Begonia espiritosantensis E.L.Jacques & Mamede (2004)
* Begonia estrellensis C.DC. (1895)
* Begonia euryphylla L.B.Sm. ex S.F.Sm. & Wassh. (1999)
* Begonia eutricha Sands (1996 publ. 1997)
* Begonia everettii Merr. (1911 publ. 1912)
* Begonia exalata C.DC. (1908)
* Begonia exigua Irmsch. (1953)
* Begonia exilis O.E.Schulz (1911)
* Begonia exposita Phutthai & M.Hughes (2017)
* Begonia extensa L.B.Sm. & B.G.Schub. (1946)
* Begonia extranea L.B.Sm. & B.G.Schub. (1939)

### F

* Begonia fenicis
* Begonia fischeri
* Begonia floccifera
* B. foliosa
* Begonia fuchsioides
* Begonia fabulosa L.B.Sm. & Wassh. (1983)
* Begonia fagifolia Otto & A.Dietr. (1836)
* Begonia falcifolia Hook.f. (1868)
* Begonia falciloba Liebm. (1852)
* Begonia fangii Y.M.Shui & C.I Peng (2005)
* Begonia fasciculata Jack (1822)
* Begonia fasciculiflora Merr. (1911 publ. 1912)
* Begonia faustinoi Burt-Utley & Utley (1999)
* Begonia fellereriana Irmsch. (1959)
* Begonia fengii T.C.Ku (1995)
* Begonia fenicis Merr. (1909)
* Begonia fernaldiana L.B.Sm. & B.G.Schub. (1947)
* Begonia fernandoi-costae Irmsch. (1953)
* Begonia ferox C.I Peng & Yan Liu (2013)
* Begonia ferramica N.Hallé (1967)
* Begonia ferruginea L.f. (1782)
* Begonia festiva Craib (1930)
* Begonia fibrosa C.B.Clarke (1879)
* Begonia fiebrigii C.DC.(1914)
* Begonia filibracteosa Irmsch. (1913)
* Begonia filiformis Irmsch. (1939)
* Begonia felis C.W.Lin & C.I Peng (2017)
* Begonia fimbriata Liebm. (1852)
* Begonia fimbribracteata Y.M.Shui & W.H.Chen (2005)
* Begonia fimbristipula Hance (1883)
* Begonia fischeri Schrank (1820)
* Begonia fissistyla Irmsch. (1949)
* Begonia flacca Irmsch. (1953 publ. 1954)
* Begonia flaccidissima Kurz, J. (1872)
* Begonia flagellaris H.Hara (1973)
* Begonia flammea Rimi (2015)
* Begonia flaviflora H.Hara (1970)
* Begonia flavovirens Kiew & S.Julia (2015)
* Begonia flexicaulis Ridl. (1916)
* Begonia flexula Ridl. (1923)
* Begonia floccifera Bedd. (1869)
* Begonia fluminensis Brade (1945)
* Begonia fluvialis M.Hughes (2015)
* Begonia foliosa Kunth (1825)
* Begonia forbesii King, J. (1902)
* Begonia fordii Irmsch. (1939)
* Begonia forgetiana Hemsl. (1901)
* Begonia formosana (Hayata) Masam. (1961)
* Begonia formosissima Sandwith (1941 publ. 1942)
* Begonia forrestii Irmsch. (1939)
* Begonia fortunensis Burt-Utley & Utley (2011)
* Begonia foveolata Irmsch. (1959)
* Begonia foxworthyi Burkill ex Ridl. (1925)
* Begonia fractiflexa S.Julia & Kiew (2016)
* Begonia fragae L.Kollmann & Peixoto (2012)
* Begonia francisiae Ziesenh. (1950)
* Begonia francoisii Guillaumin (1925)
* Begonia fraseri Kiew (1995)
* Begonia friburgensis Brade (1957)
* Begonia froebelii A.DC. (1874)
* Begonia fruticella Ridl. (1916)
* Begonia fruticosa (Klotzsch) A.DC. (1861)
* Begonia fuchsiiflora (A.DC.) A.I.Baranov & F.A.Barkley (1973)
* Begonia fuchsioides Hook. (1847)
* Begonia fulgurata C.-I Peng, C.W.Lin & Phutthai (2017)
* Begonia fulvosetulosa Brade (1943)
* Begonia fulvovillosa Warb. (1891)
* Begonia furfuracea Hook.f. (1871)
* Begonia fusca Liebm. (1852)
* Begonia fuscisetosa Sands (1996 publ. 1997)
* Begonia fuscocaulis Brade (1957)
* Begonia fusialata Warb. (1895)
* Begonia fusibulba C.DC. (1925)
* Begonia fusicarpa Irmsch. (1954)

### G

* Begonia goegoensis
* Begonia glabra
* Begonia grandis subsp. grandis
* Begonia grisea
* Begonia gabonensis J.J.de Wilde (2002)
* Begonia gagnepainiana Irmsch. (1938)
* Begonia galeolepis Ardi & D.C.Thomas (2015)
* Begonia gambutensis Ardi & D.C.Thomas (2014)
* Begonia gamolepis L.B.Sm. & B.G.Schub. (1946)
* Begonia garagarana C.DC. (1919)
* Begonia gardneri A.DC. (1859)
* Begonia garrettii Craib (1930)
* Begonia garuvae L.B.Sm. & R.C.Sm. (1971)
* Begonia gehrtii Irmsch. (1959)
* Begonia gelasensis Rimi & Kinahim (2015)
* Begonia gemella Warb. ex L.B.Sm. & Wassh. (1983)
* Begonia geminiflora L.B.Sm. & Wassh. (1979)
* Begonia gemmipara Hook.f. & Thomson (1855)
* Begonia gemmirhiza H.Lév. (1911)
* Begonia gentilii De Wild. (1906)
* Begonia gentryi Burt-Utley & Utley (2012)
* Begonia geoffrayi Gagnep. (1919)
* Begonia georgei Coyle (2009)
* Begonia geraniifolia Hook. (1835)
* Begonia geranioides Hook.f. (1866)
* Begonia germaineana Tebbitt (2015)
* Begonia gesneriifolia Aver. (2012)
* Begonia gesnerioides L.B.Sm. & B.G.Schub. (1941)
* Begonia gibbsiae Irmsch. ex Sands (2001)
* Begonia gigabracteata Hong Z.Li & H.Ma (2008)
* Begonia gigaphylla Y.M.Shui & W.H.Chen (2005)
* Begonia gilgiana Irmsch. (1913)
* Begonia gitingensis Elmer (1910)
* Begonia glaberrima Urb. & Ekman (1930)
* Begonia glabra Aubl. (1775)
* Begonia glabricaulis Irmsch. (1913)
* Begonia glandulifera Griseb. (1860)
* Begonia glandulosa A.DC. ex Hook. (1861)
* Begonia glauca (Klotzsch) Ruiz & Pav. ex A.DC. (1864)
* Begonia glaucoides Irmsch. (1949)
* Begonia glechomifolia C.M.Hu (1995)
* Begonia glutinosa Kiew (2007)
* Begonia goegoensis N.E.Br. (1882)
* Begonia goldingiana L.Kollmann & A.P.Fontana (2010)
* Begonia gomantongensis Kiew (1998)
* Begonia goniotis C.B.Clarke (1879)
* Begonia gorgonea Tebbitt (2011)
* Begonia gossweileri Irmsch. (1961)
* Begonia goudotii A.DC. (1859)
* Begonia gracilicyma Irmsch. ex M.Hughes (2009)
* Begonia gracilioides Burt-Utley & Utley (2012)
* Begonia gracilior Burt-Utley & McVaugh (2001)
* Begonia gracilipes Merr. (1911 publ. 1912)
* Begonia gracilis Kunth (1825)
* Begonia grandipetala Irmsch. (1913)
* Begonia grandis Dryand. (1791)
* Begonia grantiana Craib (1928)
* Begonia grata Geddes (1928)
* Begonia griffithiana (A.DC.) Warb. (1894)
* Begonia grisea A.DC. (1859)
* Begonia groenewegensis K.Koch & Fint. (1860)
* Begonia guaduensis Kunth (1825)
* Begonia guangxiensis C.Y.Wu (1997)
* Begonia guaniana H.Ma & Hong Z.Li (2006)
* Begonia guatemalensis Van Houtte ex Galeotti (1853)
* Begonia gueritziana Gibbs (1914)
* Begonia guishanensis S.H.Huang & Y.M.Shui (1994 publ. 1995)
* Begonia gulinqingensis S.H.Huang & Y.M.Shui (1994 publ. 1995)
* Begonia gungshanensis C.Y.Wu (1995)
* Begonia gunnerifolia Linden & André (1875)
* Begonia gusilii Rimi (2015)
* Begonia gutierrezii Coyle (2010)
* Begonia guttapila D.C.Thomas & Ardi (2009)

### H

* Begonia heracleifolia
* B. hirsuta
* B. hirtella
* Begonia hoehneana
* Begonia hahiepiana H.Q.Nguyen & Tebbitt (2006)
* Begonia hainanensis Chun & F.Chun (1939)
* Begonia halabanensis M.Hughes (2015)
* Begonia halconensis Merr. (1911 publ. 1912)
* Begonia handelii Irmsch. (1921)
* Begonia handroi Brade (1954)
* Begonia harauensis Girm. (2015)
* Begonia harlingii L.B.Sm. & Wassh. (1979)
* Begonia harmandii Gagnep. (1919)
* Begonia hasskarliana (Miq.) Miq. ex A.DC. (1864)
* Begonia hassleri C.DC., Bull. (1916)
* Begonia hatacoa Buch.-Ham. ex D.Don (1825)
* Begonia havilandii Ridl. (1906)
* Begonia hayamiana Nob.Tanaka (2007)
* Begonia hayatae Gagnep. (1919)
* Begonia hekensis D.C.Thomas (2009)
* Begonia hekouensis S.H.Huang (1999)
* Begonia heliostrophe Kiew (2001)
* Begonia hemsleyana Hook.f. (1899)
* Begonia henrilaportei Scherber. & Duruiss. (2016)
* Begonia henryi Hemsl. (1887)
* Begonia heracleifolia Schltdl. & Cham. (1830)
* Begonia herbacea Vell. (1831)
* Begonia heringeri Brade (1954)
* Begonia hernandioides Merr. (1911 publ. 1912)
* Begonia herrerae L.B.Sm. & B.G.Schub. (1944 publ. 1945)
* Begonia herteri Irmsch. (1953)
* Begonia herveyana King, J. (1902)
* Begonia heterochroma Sosef (1991 publ. 1992)
* Begonia heteroclinis Miq. ex Koord. (1898)
* Begonia heteropoda Baker (1884)
* Begonia hexandra Irmsch. (1949)
* Begonia hexaptera Sands (1996)
* Begonia heydei C.DC. (1895)
* Begonia hidirii Tawan, Ipor & Meekiong (2009)
* Begonia hilariana A.DC. (1859)
* Begonia hintoniana L.B.Sm. & B.G.Schub. (1939)
* Begonia hirsuta Aubl. (1775)
* Begonia hirsuticarpa C.W.Lin & C.I Peng (2017)
* Begonia hirsuticaulis Irmsch. (1913)
* Begonia hirsutula Hook.f. (1871)
* Begonia hirta (Klotzsch) L.B.Sm. & B.G.Schub. (1941)
* Begonia hirtella Link (1822)
* Begonia hirtitepala S.Julia & Kiew (2016)
* Begonia hispida Schott ex A.DC. (1861)
* Begonia hispidissima Zipp. ex Koord. (1898)
* Begonia hispidivillosa Ziesenh. (1950)
* Begonia hitchcockii Irmsch. (1949)
* Begonia hoehneana Irmsch. (1953)
* Begonia hohuanensis S.S.Ying (1995)
* Begonia holmnielseniana L.B.Sm. & Wassh. (1986)
* Begonia holosericea (Teijsm. & Binn.) Teijsm. & Binn. (1863)
* Begonia holosericeoides Ardi & D.C.Thomas (2014)
* Begonia holtonis A.DC. (1859)
* Begonia holttumii Irmsch. (1929)
* Begonia homonyma Steud. (1840)
* Begonia hondurensis Burt-Utley & Utley (1999)
* Begonia hongkongensis F.W.Xing (2005)
* Begonia hookeriana Gardner (1845)
* Begonia hooveriana Wiriad. (2013)
* Begonia horsfieldii (Miq.) Miq. ex A.DC. (1864)
* Begonia horticola Irmsch. (1921)
* Begonia hosensis C.W.Lin & C.I Peng (2014)
* Begonia houttuynioides T.T.Yu (1946)
* Begonia howii Merr. & Chun (1940)
* Begonia huangii Y.M.Shui & W.H.Chen (2005)
* Begonia hubertii Ziesenh. (1980)
* Begonia huegelii (Klotzsch) A.DC. (1864)
* Begonia hughesii Rubite & C.I Peng (2015)
* Begonia hullettii Ridl. (1906)
* Begonia humbertii Keraudren (1983)
* Begonia humboldtiana Gibbs (1917)
* Begonia humericola Sands (2001)
* Begonia humilicaulis Irmsch. (1913)
* Begonia humilis Aiton (1789)
* Begonia humillima L.B.Sm. & Wassh. (1983)
* Begonia hydrocotylifolia Otto ex Hook. (1842)
* Begonia hydrophylloides L.B.Sm. & B.G.Schub. (1946)
* Begonia hymenocarpa C.Y.Wu (1995)
* Begonia hymenophylla Gagnep. (1919)
* Begonia hymenophylloides Kingdon-Ward ex L.B.Sm. & Wassh. (1984)

### I

* Begonia itaguassuensis
* Begonia ibitiocensis E.L.Jacques & Mamede (2004)
* Begonia ignea (Klotzsch) Warsz. ex A.DC. (1864)
* Begonia ignita C.W.Lin & C.I Peng (2017)
* Begonia ignorata Irmsch. (1929)
* Begonia imbricata Sands (1990)
* Begonia imitans Irmsch. (1939)
* Begonia imperfecta Irmsch. (1913)
* Begonia imperialis Lem. (1860)
* Begonia incarnata Link & Otto (1828)
* Begonia incerta Craib (1911)
* Begonia incisa A.DC. (1859)
* Begonia incisoserrata (Klotzsch) A.DC. (1864)
* Begonia incompta Kiew (2015)
* Begonia incondita Craib (1930)
* Begonia inconspicua Brade (1945)
* Begonia inculta Irmsch. (1953)
* Begonia inobongensis Kiew (2015)
* Begonia inopinata Guanih (2015)
* Begonia inostegia Stapf (1894)
* Begonia inostegioides Chong (2015)
* Begonia insueta D.C.Thomas & Ardi (2011)
* Begonia insularis Brade (1957)
* Begonia insularum Irmsch. (1913)
* Begonia integerrima Spreng. (1821)
* Begonia integrifolia Dalzell (1851)
* Begonia intermixta Irmsch. (1929)
* Begonia inversa Irmsch. (1953 publ. 1954)
* Begonia involucrata Liebm. (1852)
* Begonia ionophylla Irmsch. (1913)
* Begonia iridescens Dunn (1920)
* Begonia iridifolia C.W.Lin & C.I Peng (2017)
* Begonia irmscheri L.B.Sm. & B.G.Schub. (1955)
* Begonia isabelensis Quisumb. & Merr. (1928)
* Begonia isalensis Humbert ex Aymonin & Bosser (1971 publ. 1973)
* Begonia isoptera Dryand. ex Sm. (1899)
* Begonia isopterocarpa Irmsch. (1953)
* Begonia isopteroidea King, J. (1902)
* Begonia itaguassuensis Brade (1948)
* Begonia itatiaiensis Brade (1945)
* Begonia itatinensis Irmsch. ex Brade (1944)
* Begonia itupavensis Brade (1953)
* Begonia iucunda Irmsch. (1961)

### J

* Begonia juliana
* Begonia jackiana M.Hughes (2015)
* Begonia jagorii Warb. (1904)
* Begonia jaguarensis L.Kollmann, R.S.Lopes & Peixoto (2015)
* Begonia jaliscana Burt-Utley (1986)
* Begonia jamaicensis A.DC. (1859)
* Begonia jamilahana Y.W.Low, Joffre & Ariffin (2015)
* Begonia jamilahanuana S.Julia (2016)
* Begonia jamiliana Rimi (2015)
* Begonia jaranpusangensis Girm. (2016)
* Begonia jarmilae Halda (2000)
* Begonia jayaensis Kiew (2005)
* Begonia jenginensis S.Julia & Kiew (2016)
* Begonia jenmanii Tutin (1940)
* Begonia jiewhoei Kiew (2005)
* Begonia jingxiensis D.Fang & Y.G.Wei (2004)
* Begonia jinyunensis C.I Peng, Bo Ding & Qian Wang (2014)
* Begonia jocelinoi Brade (1954)
* Begonia joffrei S.Julia (2015)
* Begonia johariana S.Julia & C.Y.Ling (2015)
* Begonia johnstonii Oliv. ex Hook.f. (1886)
* Begonia josephi A.DC. (1859)
* Begonia jugamensis S.Julia & Kiew (2015)
* Begonia julaihiana S.Julia & C.Y.Ling (2015)
* Begonia juliana Loefgr. ex Irmsch. (1953)
* Begonia juliasangii Kiew (2009)
* Begonia juninensis Irmsch. (1949)
* Begonia juntasensis Kuntze (1898)
* Begonia jureiensis S.J.Gomes da Silva & Mamede (2000)

### K

* Begonia karwinskyana
* Begonia kachak K.G.Pearce (2003)
* Begonia kachinensis Nob.Tanaka (2011)
* Begonia kalabenonensis Humbert ex Aymonin & Bosser (1971 publ. 1973)
* Begonia kalbreyeri (Oliv.) L.B.Sm. & B.G.Schub. (1955)
* Begonia kanaensis Kiew & C.Y.Ling (2016)
* Begonia kanburiensis Phutthai (2014)
* Begonia kaniensis Irmsch. (1913)
* Begonia karangputihensis Girm. (2015)
* Begonia karperi J.C.Arends (1991 publ. 1992)
* Begonia karwinskyana A.DC. (1859)
* Begonia kasutensis K.G.Pearce (2003)
* Begonia keeana Kiew (2001)
* Begonia keithii Kiew (1998)
* Begonia kelliana Irmsch. (1917)
* Begonia kemumuensis M.Hughes (2015)
* Begonia kenworthyae Ziesenh. (1950)
* Begonia keraudreniae Bosser (1983)
* Begonia kerrii Craib (1911)
* Begonia kerstingii Irmsch. (1913)
* Begonia khasiana C.B.Clarke (1879)
* Begonia kiamfeei Kiew & S.Julia (2007)
* Begonia kibambanganensis Guanih & Chong (2015)
* Begonia killipiana L.B.Sm. & B.G.Schub. (1946)
* Begonia kinabaluensis Sands (1990)
* Begonia kinahimiae Rimi (2015)
* Begonia kingdon-wardii Tebbitt (2007)
* Begonia kingiana Irmsch. (1929)
* Begonia kipandiensis S.Julia (2015)
* Begonia kisuluana Büttner (1890)
* Begonia klemmei Merr. (1911 publ. 1912)
* Begonia klossii Ridl. (1913)
* Begonia knoopii Ziesenh. (1982)
* Begonia koksunii Kiew (2005)
* Begonia komoensis Irmsch. (1921)
* Begonia konderreisiana L.B.Sm. & R.C.Sm. (1971)
* Begonia koordersii Warb. ex L.B.Sm. & Wassh. (1983)
* Begonia korthalsiana Miq. ex M.Hughes (2015)
* Begonia kortsiae Ziesenh. (1971)
* Begonia kouytcheouensis Guillaumin (1925)
* Begonia krystofii Halda (2007)
* Begonia kuchingensis C.W.Lin & C.I Peng (2017)
* Begonia kudoensis Girm. (2015)
* Begonia kuhlmannii Brade (1945)
* Begonia kui C.I Peng (2007)
* Begonia kunthiana Walp. (1852)
* Begonia kurakura Tawan, Ipor & Meekiong (2009)

### L

* Begonia lubbersii
* Begonia labiensis (Sands) S.Julia (2015)
* Begonia labordei H.Lév. (1904)
* Begonia laccophora Sands (1996 publ. 1997)
* Begonia lacera Merr. (1915)
* Begonia lacerata Irmsch. (1939)
* Begonia lachaoensis Ziesenh. (1985)
* Begonia lacunosa Warb. (1895)
* Begonia laevis Ridl. (1917)
* Begonia lagunensis Elmer (1910)
* Begonia lailana Kiew & Geri (2003)
* Begonia lambii Kiew (2001)
* Begonia lambirensis Kiew & S.Julia (2015)
* Begonia laminariae Irmsch. (1951)
* Begonia lamriana Rimi (2015)
* Begonia lamxayana Souvann. (2016)
* Begonia lancangensis S.H.Huang (1999)
* Begonia lanceolata Vell. (1831)
* Begonia lancifolia Merr. (1915)
* Begonia lancilimba Merr. (1919)
* Begonia langbianensis Baker f. (1921)
* Begonia langsonensis C.I Peng & C.W.Lin (2015)
* Begonia lansbergeae L.Linden & Rodigas (1893)
* Begonia lanstyakii Brade (1943)
* Begonia lanternaria Irmsch. (1939)
* Begonia laporteifolia Warb. (1895)
* Begonia larorum L.B.Sm. & Wassh. (1983)
* Begonia laruei M.Hughes (2009)
* Begonia lasioura D.C.Thomas & Ardi (2011)
* Begonia latistipula Merr. (1915)
* Begonia lauterbachii Warb. (1900)
* Begonia lawii C.W.Lin & C.I Peng (2017)
* Begonia laxa L.B.Sm. & B.G.Schub. (1952)
* Begonia layang-layang Kiew (2001)
* Begonia lazat Kiew & Reza Azmi (1998)
* Begonia lealii Brade (1954)
* Begonia leandrii Humbert ex Aymonin & Bosser (1971 publ. 1973)
* Begonia leathermaniae O'Reilly & Kareg. (1983)
* Begonia ledermannii Irmsch. (1913)
* Begonia lehmannii (Irmsch.) L.B.Sm. & B.G.Schub. (1955)
* Begonia leipingensis D.K.Tian, Li H.Yang & Chun Li (2016)
* Begonia leivae J.Sierra (1989)
* Begonia lempuyangensis Girm. (2009)
* Begonia lemurica Keraudren (1983)
* Begonia lengguanii Kiew (2005)
* Begonia leopoldinensis L.Kollmann (2009)
* Begonia lepida Blume (1827)
* Begonia lepidella Ridl. (1917)
* Begonia leprosa Hance (1883)
* Begonia leptantha C.B.Rob. (1911 publ. 1912)
* Begonia leptoptera H.Hara (1973)
* Begonia leptostyla Irmsch. (1949)
* Begonia letestui J.J.de Wilde (2002)
* Begonia letouzeyi Sosef (1994)
* Begonia leucochlora Sands (1996 publ. 1997)
* Begonia leuconeura Urb. & Ekman (1930)
* Begonia leucosticta Warb. (1904)
* Begonia leucotricha Sands (1996 publ. 1997)
* Begonia leuserensis M.Hughes (2015)
* Begonia libanensis Urb. (1925)
* Begonia libera (L.B.Sm. & B.G.Schub.) L.B.Sm. & B.G.Schub. (1955)
* Begonia lichenora C.W.Lin & C.I Peng (2017)
* Begonia liesneri Burt-Utley & Utley (2012)
* Begonia lignescens Morton (1937)
* Begonia lilliputana M.Hughes (2015)
* Begonia limprichtii Irmsch. (1922)
* Begonia linauensis S.Julia (2015)
* Begonia lindleyana Walp. (1843)
* Begonia lindmanii Brade (1953)
* Begonia linearifolia J.Sierra (1991 publ. 1993)
* Begonia lineolata Brade (1958)
* Begonia lingiae S.Julia (2016)
* Begonia lipingensis Irmsch. (1927)
* Begonia lipolepis L.B.Sm. (1973)
* Begonia listada L.B.Sm. & Wassh. (1981)
* Begonia lithophila C.Y.Wu (1995)
* Begonia littleri Merr. (1911 publ. 1912)
* Begonia liuyanii C.I Peng, S.M.Ku & W.C.Leong (2005)
* Begonia lobbii (Hassk.) A.DC. (1864)
* Begonia locii C.I Peng, C.W.Lin & H.Q.Nguyen (2015)
* Begonia loheri Merr. (1911 publ. 1912)
* Begonia lombokensis Girm. (2009)
* Begonia lomensis Britton & P.Wilson (1923)
* Begonia longanensis C.Y.Wu (1997)
* Begonia longipetiolata Gilg (1904)
* Begonia longgangensis C.I Peng & Yan Liu (2013)
* Begonia longialata K.Y.Guan & D.K.Tian (2000)
* Begonia longibarbata Brade (1948)
* Begonia longibractea Merr. (1920 publ. 1921)
* Begonia longicarpa K.Y.Guan & D.K.Tian (2000)
* Begonia longicaulis Ridl. (1917)
* Begonia longiciliata C.Y.Wu (1995)
* Begonia longifolia Blume (1823)
* Begonia longinoda Merr. (1911 publ. 1912)
* Begonia longipedunculata Golding & Kareg. (1984)
* Begonia longirostris Benth. (1845)
* Begonia longiscapa Warb. (1904)
* Begonia longiseta Irmsch. (1953 publ. 1954)
* Begonia longistipula Merr. (1911 publ. 1912)
* Begonia longistyla Y.M.Shui & W.H.Chen (2005)
* Begonia longivillosa A.DC. (1859)
* Begonia lopensis Sosef & M.E.Leal (2002)
* Begonia lophoptera Rolfe (1914)
* Begonia loranthoides Hook.f. (1871)
* Begonia lossiae L.Kollmann (2008)
* Begonia louis-williamsii Burt-Utley (1982)
* Begonia lowiana King, J. (1902)
* Begonia lubbersii É.Morren (1883)
* Begonia lucidissima Golding & Kareg. (1984)
* Begonia lucifuga Irmsch. (1949)
* Begonia lucychongiana S.Julia & Kiew (2013)
* Begonia ludicra A.DC. (1859)
* Begonia ludwigii Irmsch. (1937)
* Begonia lugonis L.B.Sm. & Wassh. (1986)
* Begonia lugrae Ardhaka & Undaharta (2013)
* Begonia lukuana Y.C.Liu & C.H.Ou (1982)
* Begonia lunaris E.L.Jacques (2008)
* Begonia lunatistyla Irmsch. (1953 publ. 1954)
* Begonia luochengensis S.M.Ku, C.I Peng & Yan Liu (2004)
* Begonia lutea L.B.Sm. & B.G.Schub. (1946)
* Begonia luxurians Scheidw. (1848)
* Begonia luzhaiensis T.C.Ku (1999)
* Begonia luzonensis Warb. (1904)
* Begonia lyallii A.DC. (1859)
* Begonia lyman-smithii Burt-Utley & Utley (1987)
* Begonia lyniceorum Burt-Utley (1983)

### M

* Begonia maculata
* Begonia macduffieana L.B.Sm. & B.G.Schub. (1985)
* Begonia macgregorii Merr. (1912)
* Begonia machrisiana L.B.Sm. & B.G.Schub. (1961)
* Begonia macintyreana M.Hughes (2006)
* Begonia macra A.DC. (1859)
* Begonia macrocarpa Warb. (1895)
* Begonia macrotis Vis. (1858-59)
* Begonia macrotoma Irmsch. (1951)
* Begonia maculata Raddi (1820)
* Begonia macvaughii Burt-Utley & Utley (2014)
* Begonia madaiensis Kiew (2001)
* Begonia madecassa Keraudren (1983)
* Begonia maestrensis Urb. (1925)
* Begonia magdalenae L.B.Sm. & B.G.Schub. (1946)
* Begonia magdalenensis Brade (1945)
* Begonia magentifolia Kiew & S.Julia (2013)
* Begonia magnicarpa C.W.Lin & C.I Peng (2017)
* Begonia majungaensis Guillaumin (1928)
* Begonia makrinii C.V.Morton ex Burt-Utley & Utley (2011)
* Begonia malabarica Lam. (1785)
* Begonia malachosticta Sands (1990)
* Begonia malindangensis Merr. (1911 publ. 1912)
* Begonia malipoensis S.H.Huang & Y.M.Shui (1994 publ. 1995)
* Begonia malmquistiana Irmsch. (1913)
* Begonia mamutensis Sands (2001)
* Begonia mananjebensis Humbert (1972)
* Begonia mangorensis Humbert (1972)
* Begonia manhaoensis S.H.Huang & Y.M.Shui (1999)
* Begonia manicata Brongn. (1842)
* Begonia manillensis A.DC. (1859)
* Begonia mannii Hook.f. (1864)
* Begonia manuselaensis Ardhaka & Ardi (2016)
* Begonia maracayuensis Parodi (1878)
* Begonia mariae L.B.Sm. (1973)
* Begonia mariaensis Rimi & Simun (2015)
* Begonia mariannensis Wassh. & McClellan (1995)
* Begonia marinae Tebbitt (2014 publ. 2015)
* Begonia mariti Burt-Utley (1990)
* Begonia marnieri Keraudren (1983)
* Begonia marojejyensis Humbert (1955)
* Begonia martabanica A.DC. (1859)
* Begonia martinezii Burt-Utley & Utley (2014)
* Begonia masarangensis Irmsch. (1913)
* Begonia mashanica D.Fang & D.H.Qin (2004)
* Begonia masoalaensis M.Hughes (2011)
* Begonia masoniana Irmsch. ex Ziesenh. (1971)
* Begonia matangensis S.Julia & Kiew (2015)
* Begonia matogrossensis L.B.Sm. ex S.F.Sm. & Wassh. (1999)
* Begonia mattos-silvae L.B.Sm. ex S.F.Sm. & Wassh. (1999)
* Begonia matudae Burt-Utley & Utley (2011)
* Begonia maurandiae A.DC. (1859)
* Begonia maxwelliana King, J. (1902)
* Begonia maynensis A.DC. (1859)
* Begonia mazae Ziesenh. (1947)
* Begonia mbangaensis Sosef (1991 publ. 1992)
* Begonia mcphersonii Burt-Utley & Utley (2012)
* Begonia mearnsii Merr. (1911 publ. 1912)
* Begonia media Merr. & L.M.Perry (1943)
* Begonia medusae Linden (1861)
* Begonia megacarpa Merr. (1914)
* Begonia megalantha Merr. (1915)
* Begonia megalophyllaria C.Y.Wu (1995)
* Begonia megaptera A.DC. (1859)
* Begonia mekonggensis Girm. & Wiriad. (2009)
* Begonia melanobullata C.I Peng & C.W.Lin (2015)
* Begonia melanosticta Chong & Guanih (2015)
* Begonia melikopia Kiew (2001)
* Begonia melinauensis S.Julia & Kiew (2013)
* Begonia membranacea A.DC. (1859)
* Begonia mendumae M.Hughes (2006)
* Begonia menglianensis Y.Y.Qian (2001)
* Begonia mengtzeana Irmsch. (1939)
* Begonia mentewangensis Girm. (2015)
* Begonia meridensis A.DC. (1859)
* Begonia meriraiensis S.Julia & Kiew (2009)
* Begonia merrilliana C.I Peng, Rubite, C.W.Lin & K.F.Chung (2017)
* Begonia merrittii Merr. (1910)
* Begonia metallicolor C.W.Lin & C.I Peng (2017)
* Begonia meyeri-johannis Engl. (1892)
* Begonia meysseliana Linden (1883)
* Begonia michoacana L.B.Sm. & B.G.Schub. (1947)
* Begonia micranthera Griseb. (1874)
* Begonia microcarpa A.DC. (1864)
* Begonia microphylla (Klotzsch) A.DC. (1864)
* Begonia microptera Hook.f. (1857)
* Begonia microsperma Warb. (1895)
* Begonia mildbraedii Gilg (1913)
* Begonia militaris L.B.Sm. & B.G.Schub. (1945)
* Begonia mindanaensis Warb. (1904)
* Begonia mindorensis Merr. (1911 publ. 1912)
* Begonia minicarpa H.Hara (1972)
* Begonia minjemensis Irmsch. (1913)
* Begonia minor Jacq. (1787)
* Begonia minuscula Aver. (2012)
* Begonia minuta Sosef (1991 publ. 1992)
* Begonia minutiflora Sands (2001)
* Begonia minutifolia N.Hallé (1972)
* Begonia miranda Irmsch. (1951)
* Begonia modestiflora Kurz (1871)
* Begonia molinana Burt-Utley (1984)
* Begonia molleri (C.DC.) Warb. (1894)
* Begonia mollicaulis Irmsch. (1957)
* Begonia mollis A.DC. (1864)
* Begonia monadelpha (Klotzsch) Ruiz & Pav. ex A.DC. (1864)
* Begonia monantha Warb. (1905)
* Begonia moneta C.I Peng, Rimi & C.W.Lin (2015)
* Begonia monicae Aymonin & Bosser (1983)
* Begonia monophylla Pav. ex A.DC. (1859)
* Begonia montana (A.DC.) Warb. (1894)
* Begonia montaniformis C.I Peng, C.W.Lin & H.Q.Nguyen (2015)
* Begonia monte-alenensis Sosef (2014)
* Begonia montis-bismarckii Warb. (1905)
* Begonia montis-elephantis J.J.de Wilde (2002)
* Begonia mooreana (Irmsch.) L.L.Forrest & Hollingsw. (2003)
* Begonia morelii Irmsch. ex Kareg. (1975)
* Begonia morifolia T.T.Yu (1948)
* Begonia morii Burt-Utley (1982)
* Begonia morrisiorum Rekha Morris & P.D.McMillan (2010)
* Begonia morsei Irmsch. (1939)
* Begonia moszkowskii Irmsch. (1913)
* Begonia motozintlensis Burt-Utley & Utley (2014)
* Begonia moysesii Brade (1958)
* Begonia mucronistipula C.DC. (1919)
* Begonia muliensis T.T.Yu (1948)
* Begonia multangula Blume (1827)
* Begonia multibracteata Girm. (2009)
* Begonia multidentata Warb. (1905)
* Begonia multijugata M.Hughes (2009)
* Begonia multinervia Liebm. (1852)
* Begonia multistaminea Burt-Utley (1983)
* Begonia muricata Blume (1823)
* Begonia murina Craib (1928)
* Begonia murudensis Merr. (1928)
* Begonia murumensis S.Julia & C.Y.Ling (2015)
* Begonia myanmarica C.I Peng & Y.D.Kim (2017)
* Begonia mystacina L.B.Sm. & Wassh. (1984)
* Begonia mysteriosa L.Kollmann & A.P.Fontana (2008)

### N

* Begonia naumoniensis
* Begonia nagaensis Kiew & S.Julia (2009)
* Begonia nahangensis Aver. & H.Q.Nguyen (2012)
* Begonia nana L'Hér. (1788)
* Begonia nantoensis M.J.Lai & N.J.Chung (1992)
* Begonia napoensis L.B.Sm. & Wassh. (1986)
* Begonia natunaensis C.W.Lin & C.I Peng (2014)
* Begonia naumoniensis Irmsch. (1913)
* Begonia neglecta A.DC. (1859)
* Begonia negrosensis Elmer (1910)
* Begonia nelumbiifolia Schltdl. & Cham. (1830)
* Begonia nemoralis L.B.Sm. & B.G.Schub. (1947)
* Begonia neocomensium A.DC. (1859)
* Begonia neoharlingii L.B.Sm. & Wassh. (1985)
* Begonia neoperrieri Humbert ex Aymonin & Bosser (1971 publ. 1973)
* Begonia neopurpurea L.B.Sm. & Wassh. (1983)
* Begonia nepalensis (A.DC.) Warb. (1894)
* Begonia nephrophylla Undaharta & Ardi (2016)
* Begonia nevadensis Dorr (1999)
* Begonia niahensis K.G.Pearce (2003)
* Begonia nigritarum Steud. (1821)
* Begonia ningmingensis D.Fang, Y.G.Wei & C.I.Peng (2006)
* Begonia nivea Parish ex Kurz, J. (1873)
* Begonia nix C.W.Lin & C.I Peng (2017)
* Begonia nobmanniae D.C.Thomas & Ardi (2011)
* Begonia nossibea A.DC. (1859)
* Begonia nosymangabensis Scherber. & Duruiss. (2017)
* Begonia notata Craib (1928)
* Begonia nothobaramensis Joffre (2015)
* Begonia notiophila Urb. (1930)
* Begonia novalombardiensis L.Kollmann (2006)
* Begonia novogranatae A.DC. (1864)
* Begonia novoguineensis Merr. & L.M.Perry (1943)
* Begonia nubicola L.B.Sm. & B.G.Schub. (1957)
* Begonia nuda Irmsch. (1953)
* Begonia nummulariifolia Putz. (1853)
* Begonia nurii Irmsch. (1929)
* Begonia nuwakotensis S.Rajbh. (2010)
* Begonia nyassensis Irmsch. (1961)
* Begonia nymphaeifolia T.T.Yu (1948)

### O

* Begonia obscura
* Begonia oaxacana A.DC. (1859)
* Begonia obdeltata Gregório & E.L.Jacques (2014)
* Begonia oblanceolata Rusby (1920)
* Begonia obliqua L. (1753)
* Begonia obliquifolia S.H.Huang & Y.M.Shui (1999)
* Begonia oblongata Merr. (1912)
* Begonia oblongifolia Stapf (1894)
* Begonia obovatistipula C.DC. (1914)
* Begonia obovoidea Craib (1930)
* Begonia obscura Brade (1957)
* Begonia obsolescens Irmsch. (1951)
* Begonia obtecticaulis Irmsch. (1949)
* Begonia obtusifolia Merr. (1919)
* Begonia occhionii Brade (1943)
* Begonia octopetala L'Hér. (1788)
* Begonia odeteiantha Handro (1969)
* Begonia oellgaardii L.B.Sm. & Wassh. (1986)
* Begonia olbia Kerch. (1883)
* Begonia oligandra Merr. & L.M.Perry (1943)
* Begonia oligantha Merr. (1915)
* Begonia oligophylla Blume ex Miq. (1856)
* Begonia olivacea Ardi (2015)
* Begonia oliveri L.B.Sm. & B.G.Schub. (1955)
* Begonia olsoniae L.B.Sm. & B.G.Schub. (1965)
* Begonia ophiogyna L.B.Sm. & B.G.Schub. (1946)
* Begonia opuliflora Putz. (1854)
* Begonia orbiculata Jack (1821)
* Begonia orchidiflora Griff. (1848)
* Begonia oreodoxa Chun & F.Chun (1995)
* Begonia oreophila Kiew (2005)
* Begonia organensis Brade (1944)
* Begonia ornithocarpa Standl. (1929)
* Begonia ornithophylla Irmsch. (1939)
* Begonia otophora Merr. & L.M.Perry (1943)
* Begonia otophylla L.B.Sm. & B.G.Schub. (1952)
* Begonia ovatifolia A.DC. (1859)
* Begonia oxyanthera Warb. (1895)
* Begonia oxyloba Welw. ex Hook.f. (1871)
* Begonia oxysperma A.DC. (1859)
* Begonia oxyura Merr. & L.M.Perry (1943)
* Begonia ozotothrix D.C.Thomas (2009)

### P

* Begonia parviflora
* Begonia pachypoda L.Kollmann & Peixoto (2013)
* Begonia pachyrhachis L.B.Sm. & Wassh. (1983)
* Begonia padangensis Irmsch. (1953 publ. 1954)
* Begonia padawanensis C.W.Lin & C.I Peng (2014)
* Begonia paganuccii Gregório & J.A.S.Costa (2015)
* Begonia palawanensis Merr. (1911 publ. 1912)
* Begonia paleacea Kurz (1871)
* Begonia paleata A.DC. (1859)
* Begonia palmata D.Don (1825)
* Begonia palmeri S.Watson (1886)
* Begonia panamensis Burt-Utley & Utley (2012)
* Begonia panayensis Merr. (1919)
* Begonia panchtharensis S.Rajbh. (2010)
* Begonia paniculata Parodi (1878)
* Begonia pantherina Putz. ex Linden (1862)
* Begonia paoana Kiew & S.Julia (2007)
* Begonia papuana Warb. (1900)
* Begonia papulifolia S.Julia & C.Y.Ling (2016)
* Begonia papyraptera Sands (1996 publ. 1997)
* Begonia paracauliflora Rimi, C.I Peng & S.M.Ku (2015)
* Begonia paraguayensis Parodi (1878)
* Begonia paranaensis Brade (1944)
* Begonia parcifolia C.DC. (1919)
* Begonia parilis Irmsch. (1953)
* Begonia parishii C.B.Clarke (1879)
* Begonia parodiana L.B.Sm. & B.G.Schub. (1941)
* Begonia parva Merr. (1911 publ. 1912)
* Begonia parviflora Poepp. & Endl. (1835)
* Begonia parvifolia Schott (1827)
* Begonia parvilimba Merr. (1925)
* Begonia parvistipulata Irmsch. (1953)
* Begonia parvula H.Lév. & Vaniot (1906)
* Begonia parvuliflora A.DC. (1859)
* Begonia pasamanensis M.Hughes (2009)
* Begonia pastoensis A.DC. (1859)
* Begonia paucilobata C.Y.Wu (1995)
* Begonia paulensis A.DC. (1859)
* Begonia paupercula King, J. (1902)
* Begonia pavonina Ridl. (1909)
* Begonia payung S.Julia & Kiew (2009)
* Begonia pearcei Hook.f. (1865)
* Begonia pectennervia L.B.Sm. & Wassh. (1986)
* Begonia pedata Liebm. (1852)
* Begonia pedatifida H.Lév. (1909)
* Begonia pediophylla Merr. & L.M.Perry (1943)
* Begonia pedunculosa Wall. (1830)
* Begonia peekelii Irmsch. (1913)
* Begonia peii C.Y.Wu (1995)
* Begonia pelargoniiflora J.J.de Wilde & J.C.Arends (1991 publ. 1992)
* Begonia peltata Otto & A.Dietr. (1841)
* Begonia peltatifolia Li (1944)
* Begonia peltifolia Schott (1827)
* Begonia peltigera Irmsch. (1953)
* Begonia pendula Ridl. (1906)
* Begonia pengchingii Phutthai & M.Hughes (2017)
* Begonia pengii S.M.Ku & Yan Liu (2008)
* Begonia penrissenensis Kiew & S.Julia (2007)
* Begonia pensilis L.B.Sm. & Wassh. (1984)
* Begonia pentandra W.N.Takeuchi (2015)
* Begonia pentaphragmifolia Ridl. (1916)
* Begonia pentaphylla Walp. (1843)
* Begonia peperomioides Hook.f. (1871)
* Begonia per-dusenii Brade (1953)
* Begonia perakensis King, J. (1902)
* Begonia peridoticola Rimi, C.I Peng & C.W.Lin (2015)
* Begonia peristegia Stapf (1901)
* Begonia pernambucensis Brade (1954)
* Begonia perpusilla A.DC. (1859)
* Begonia perrieri Bois (1915)
* Begonia perryae L.B.Sm. & Wassh. (1983)
* Begonia peruibensis Handro (1979 publ. 1980)
* Begonia peruviana A.DC. (1859)
* Begonia petasitifolia Brade (1971)
* Begonia phamiana Kiew (2007)
* Begonia phantasma Tebbitt (2015)
* Begonia philodendroides Ziesenh. (1954)
* Begonia phoeniogramma Ridl. (1917)
* Begonia phrixophylla Blatt. & McCann (1931)
* Begonia phuthoensis H.Q.Nguyen (2004)
* Begonia phutthaii M.Hughes (2017)
* Begonia physandra Merr. & L.M.Perry (1943)
* Begonia pickelii Irmsch. (1949)
* Begonia picta Sm. (1806)
* Begonia picturata Yan Liu, S.M.Ku & C.I Peng (2005)
* Begonia pierrei Gagnep. (1919)
* Begonia pilgeriana Irmsch. (1953)
* Begonia pilosa Jack (1822)
* Begonia pilosella Irmsch. (1949)
* Begonia pinetorum A.DC. (1859)
* Begonia pinglinensis C.I Peng (2005)
* Begonia pinheironis L.B.Sm. ex S.F.Sm. & Wassh. (1999)
* Begonia pinnatifida Merr. & L.M.Perry (1943)
* Begonia piresiana Handro (1964)
* Begonia piring Kiew & S.Julia (2009)
* Begonia piurensis L.B.Sm. & B.G.Schub. (1941)
* Begonia plantaginea L.B.Sm. & B.G.Schub. (1945)
* Begonia platanifolia Schott (1827)
* Begonia platycarpa Y.M.Shui & W.H.Chen (2005)
* Begonia platyphylla Merr. (1915)
* Begonia platyptera Urb. (1930)
* Begonia plebeja Liebm. (1852)
* Begonia pleioclada Irmsch. (1953 publ. 1954)
* Begonia pleiopetala A.DC. (1859)
* Begonia plieranensis S.Julia & C.Y.Ling (2015)
* Begonia plumieri Kunth ex A.DC. (1864)
* Begonia pluvialis L.B.Sm. ex S.F.Sm. & Wassh. (1999)
* Begonia poculifera Hook.f. (1871)
* Begonia poilanei Kiew (2007)
* Begonia polilloensis Tebbitt (2004 publ. 2005)
* Begonia polyandra Irmsch. (1953)
* Begonia polyclada C.I Peng, C.W.Lin & Rubite (2017)
* Begonia polygonata Liebm. (1852)
* Begonia polygonifolia A.DC. (1861)
* Begonia polygonoides Hook.f. (1871)
* Begonia polypetala A.DC. (1878)
* Begonia polytricha C.Y.Wu (1995)
* Begonia popenoei Standl. (1930)
* Begonia porteana Van Geert (1882)
* Begonia porteri H.Lév. & Vaniot (1910)
* Begonia portillana S.Watson (1887)
* Begonia postarii Kiew (1998)
* Begonia potamophila Gilg (1904)
* Begonia praerupta Irmsch. (1949)
* Begonia praetermissa Kiew (2005)
* Begonia prasinimarginata S.Julia (2015)
* Begonia preussii Warb. (1894)
* Begonia prieurii A.DC. (1859)
* Begonia princeae Gilg (1902)
* Begonia princeps (Klotzsch) A.DC. (1861)
* Begonia pringlei S.Watson (1891)
* Begonia prionophylla Irmsch. (1949)
* Begonia prionota D.C.Thomas & Ardi (2011)
* Begonia prismatocarpa Hook. (1862)
* Begonia procridifolia Wall. ex A.DC. (1863)
* Begonia prolifera A.DC. (1859)
* Begonia prolixa Craib (1930)
* Begonia promethea Ridl. (1906)
* Begonia propinqua Ridl. (1906)
* Begonia pruinata (Klotzsch) A.DC. (1864)
* Begonia pryeriana Ridl. (1906)
* Begonia pseudodaedalea P.D.McMillan & Rekha Morris (2010)
* Begonia pseudodaxinensis S.M.Ku, Yan Liu & C.I Peng (2006)
* Begonia pseudodryadis C.Y.Wu (1995)
* Begonia pseudoglauca Irmsch. (1949)
* Begonia pseudolateralis Warb. (1904)
* Begonia pseudoleprosa C.I Peng, Yan Liu & S.M.Ku (2006)
* Begonia pseudolubbersii Brade (1957)
* Begonia pseudomuricata Girm. (2009)
* Begonia pseudopeltata Burt-Utley & Utley (2012)
* Begonia pseudopleiopetala Tebbitt (2014 publ. 2015)
* Begonia pseudoscottii Girm. (2015)
* Begonia pseudosubperfoliata Phutthai & M.Hughes (2017)
* Begonia pseudoviola Gilg (1904)
* Begonia psilophylla Irmsch. (1951)
* Begonia pteridiformis Phutthai (2010)
* Begonia pteridoides Scherber. & Duruiss. (2017)
* Begonia puberula Sosef (2014)
* Begonia pubescens Ridl. (1906)
* Begonia pudica L.B.Sm. & B.G.Schub. (1950)
* Begonia pulchella Raddi (1820)
* Begonia pulcherrima Sosef (1991 publ. 1992)
* Begonia pulchra (Ridl.) L.L.Forrest & Hollingsw. (2003)
* Begonia pulchrifolia D.K.Tian & Ce H.Li (2015)
* Begonia pululahuana C.DC. (1908)
* Begonia pulvinifera C.I Peng & Yan Liu (2006)
* Begonia pumila Craib (1930)
* Begonia pumilio Irmsch. (1929)
* Begonia punbatuensis Kiew (2001)
* Begonia punchak Kiew & S.Julia (2007)
* Begonia purdieana A.DC. (1859)
* Begonia purpureofolia S.H.Huang & Y.M.Shui (1994 publ. 1995)
* Begonia purpusii Houghton ex Ziesenh. (1960)
* Begonia puspitae Ardi (2009)
* Begonia pustulata Liebm. (1852)
* Begonia puttii Craib (1928)
* Begonia pycnantha Urb. & Ekman (1930)
* Begonia pygmaea Irmsch. (1961)
* Begonia pyrrha Ridl. (1906)

### Q

* Begonia quadrialata Warb. (1894)
* Begonia quaternata L.B.Sm. & B.G.Schub. (1950)
* Begonia quercifolia A.DC. (1859)

### R

* Begonia rabilii Craib (1930)
* Begonia racemiflora Ortgies ex C.Chev. (1938)
* Begonia racemosa Jack (1822)
* Begonia rachmatii Tebbitt (2004 publ. 2005)
* Begonia radicans Vell. (1831)
* Begonia rafael-torresii Burt-Utley (1990)
* Begonia raimondii Irmsch. (1949)
* Begonia rajah Ridl. (1911)
* Begonia rambaiensis Kiew (2015)
* Begonia rambutan Rimi (2015)
* Begonia ramentacea Paxton (1846)
* Begonia ramlanii Rimi & Handry (2015)
* Begonia ramosii Merr. (1911 publ. 1912)
* Begonia ramosissima Kiew & S.Julia (2013)
* Begonia ranaiensis Girm. (2012)
* Begonia randiana Merr. & L.M.Perry (1943)
* Begonia rantemarioensis D.C.Thomas & Ardi (2011)
* Begonia raoensis M.Hughes (2015)
* Begonia ravenii C.I.Peng & Y.K.Chen (1988)
* Begonia razafinjohanyi Aymonin & Bosser (1983)
* Begonia reflexisquamosa C.Y.Wu (1995)
* Begonia reginula Kiew (2005)
* Begonia relicta L.B.Sm. & B.G.Schub. (1945)
* Begonia renifolia Irmsch. (1913)
* Begonia reniformis Dryand. (1791)
* Begonia repens Lam. (1785)
* Begonia repenticaulis Irmsch. (1939)
* Begonia reptans Benth. (1840)
* Begonia retakensis (Sands) Joffre (2015)
* Begonia retinervia D.Fang, D.H.Qin & C.I.Peng (2006)
* Begonia retusa O.E.Schulz (1911)
* Begonia rex Putz. (1857)
* Begonia rheifolia Irmsch. (1929)
* Begonia rhizocaulis (Klotzsch) A.DC. (1864)
* Begonia rhodantha Ridl. (1916)
* Begonia rhodochaeta S.Julia & Kiew (2009)
* Begonia rhodochlamys L.B.Sm. & B.G.Schub. (1945)
* Begonia rhodoneura S.Julia (2013)
* Begonia rhodophylla C.Y.Wu (1995)
* Begonia rhodotricha S.Julia & C.Y.Ling (2015)
* Begonia rhoephila Ridl. (1917)
* Begonia rhombipetala S.Julia & C.Y.Ling (2015)
* Begonia rhyacophila Kiew (2005)
* Begonia rhynchocarpa Y.M.Shui & W.H.Chen (2005)
* Begonia rieckei Warb. (1891)
* Begonia riedelii A.DC. (1859)
* Begonia rigida (Klotzsch) Regel ex A.DC. (1864)
* Begonia rigidifolia Aver. (2012)
* Begonia rimarum Craib (1930)
* Begonia riparia Irmsch. (1961)
* Begonia rizalensis Merr. (1911 publ. 1912)
* Begonia robusta Blume (1827)
* Begonia rockii Irmsch. (1939)
* Begonia roezlii Regel (1876)
* Begonia rongjiangensis T.C.Ku (1995)
* Begonia rosacea Putz. (1857)
* Begonia roseibractea Ziesenh. (1983)
* Begonia roseopunctata Kiew (2015)
* Begonia rossmanniae A.DC. (1864)
* Begonia rostrata Welw. ex Hook.f. (1871)
* Begonia rotunda Vell. (1831)
* Begonia rotundibracteata Kiew (2015)
* Begonia rotundifolia Lam. (1785)
* Begonia rotundilimba S.H.Huang & Y.M.Shui (1994 publ. 1995)
* Begonia roxburghii (Miq.) A.DC. (1864)
* Begonia rubella Buch.-Ham. ex D.Don (1825)
* Begonia rubida Ridl. (1906)
* Begonia rubiginosipes Irmsch. (1949)
* Begonia rubinea Hong Z.Li & H.Ma (2005)
* Begonia rubiteae M.Hughes (2010)
* Begonia ruboides C.M.Hu (1995)
* Begonia rubricaulis Hook. (1844)
* Begonia rubriflora L.Kollmann (2011)
* Begonia rubrifolia Merr. (1919)
* Begonia rubrobracteolata S.Julia & C.Y.Ling (2016)
* Begonia rubromarginata Gilg (1904)
* Begonia rubronervata De Wild. (1908)
* Begonia rubropilosa A.DC. (1859)
* Begonia rubropunctata S.H.Huang & Y.M.Shui (1994 publ. 1995)
* Begonia rubrosetosa Aver. (2012)
* Begonia rubrotepala S.Julia (2016)
* Begonia rubrotincta L.B.Sm. & B.G.Schub. (1963)
* Begonia rufa Thunb. (1817)
* Begonia rufipila Merr. (1911 publ. 1912)
* Begonia rufosericea Toledo (1946)
* Begonia rugosula Aver. (2012)
* Begonia ruhlandiana Irmsch. (1953)
* Begonia rumpiensis Kupicha (1978)
* Begonia rupium Irmsch. (1953)
* Begonia ruschii L.Kollmann (2003)
* Begonia russelliana L.B.Sm. ex S.F.Sm. & Wassh. (1999)
* Begonia ruthiae S.Julia (2015)
* Begonia rutilans (Klotzsch) A.DC. (1864)
* Begonia rwandensis J.C.Arends (1991 publ. 1992)

### S

* Begonia sabahensis Kiew & J.H.Tan (2004)
* Begonia sadirensis Kiew & S.Julia (2016)
* Begonia sageaensis Wiriad. (2012)
* Begonia salaziensis (Gaudich.) Warb. (1894)
* Begonia salesopolensis S.J.Gomes da Silva & Mamede (2000)
* Begonia salisburyana Irmsch. (1954)
* Begonia salomonensis Merr. & L.M.Perry (1943)
* Begonia samarensis Merr. (1926)
* Begonia sambiranensis Humbert ex Aymonin & Bosser (1971 publ. 1973)
* Begonia samhaensis M.Hughes & A.G.Mill. (2002)
* Begonia sandalifolia C.B.Clarke (1879)
* Begonia sandsiana W.N.Takeuchi (2013)
* Begonia sandtii Houghton ex Ziesenh. (1969)
* Begonia sanguinea Raddi (1820)
* Begonia sanguineopilosa D.C.Thomas & Ardi (2011)
* Begonia santarosensis Kuntze (1898)
* Begonia santos-limae Brade (1943)
* Begonia sarangica Kiew & S.Julia (2009)
* Begonia sarasinorum Irmsch. (1913)
* Begonia sarawakensis Ridl. (1906)
* Begonia sarcocarpa Ridl. (1917)
* Begonia sarmentacea Brilmayer (1960)
* Begonia sarmentosa L.B.Sm. & Wassh. (1983)
* Begonia sartorii Liebm. (1852)
* Begonia satrapis C.B.Clarke (1879)
* Begonia saxicola A.DC. (1859)
* Begonia saxifraga A.DC. (1859)
* Begonia saxifragifolia Craib (1930)
* Begonia scabrida A.DC. (1864)
* Begonia scapigera Hook.f. (1871)
* Begonia schaeferi Engl. (1921)
* Begonia scharffii Hook.f. (1888)
* Begonia schliebenii Irmsch. (1961)
* Begonia schlumbergeriana Lem. (1858)
* Begonia schulziana Urb. & Ekman (1930)
* Begonia sciadiophora L.B.Sm. & B.G.Schub. (1946)
* Begonia sciaphila Gilg ex Engl. (1921)
* Begonia scintillans Dunn (1920)
* Begonia scitifolia Irmsch. (1939)
* Begonia scorpiocaulis Moonlight & Tebbitt (2017)
* Begonia scortechinii King, J. (1902)
* Begonia scottii Tebbitt (2005)
* Begonia scutifolia Hook.f. (1871)
* Begonia scutulum Hook.f. (1871)
* Begonia secunda L.B.Sm. & Wassh. (1979)
* Begonia seemanniana A.DC. (1859)
* Begonia segregata L.B.Sm. & B.G.Schub. (1960)
* Begonia semidigitata Brade (1945)
* Begonia semiovata Liebm. (1852)
* Begonia semiparietalis Yan Liu, S.M.Ku & C.I Peng (2006)
* Begonia semongkatensis Girm. (2016)
* Begonia sendangensis Ardi (2013)
* Begonia serapatensis Kiew & S.Julia (2007)
* Begonia serianensis C.W.Lin & C.I Peng (2017)
* Begonia sericoneura Liebm. (1852)
* Begonia serotina A.DC. (1859)
* Begonia serpens Merr. (1919)
* Begonia serranegrae L.B.Sm. ex S.F.Sm. & Wassh. (1999)
* Begonia serraticauda Merr. & L.M.Perry (1943)
* Begonia serratipetala Irmsch. (1913)
* Begonia sessilifolia Hook.f. (1871)
* Begonia setiamensis S.Julia & Kiew (2015)
* Begonia setifolia Irmsch. (1939)
* Begonia setulosa Bertol. (1840)
* Begonia setulosopeltata C.Y.Wu (1997)
* Begonia seychellensis Hemsl. (1916)
* Begonia sharpeana F.Muell. (1887)
* Begonia shilendrae Rekha Morris & P.D.McMillan (2012)
* Begonia siamensis Gagnep. (1919)
* Begonia sibthorpioides Ridl. (1916)
* Begonia sibutensis Sands (1996 publ. 1997)
* Begonia siccacaudata J.Door. (2000)
* Begonia sikkimensis A.DC. (1859)
* Begonia silletensis (A.DC.) C.B.Clarke (1879)
* Begonia simolapensis Ardi (2015)
* Begonia simulans Merr. & L.M.Perry (1943)
* Begonia simunii Rimi (2015)
* Begonia sinobrevicaulis T.C.Ku (1999)
* Begonia sinofloribunda Dorr (1999)
* Begonia sinovietnamica C.Y.Wu (1997)
* Begonia sinuata Wall. ex Meisn. (1836)
* Begonia siregarii Ardi & D.C.Thomas (2014)
* Begonia sirukitii S.Julia & C.Y.Ling (2015)
* Begonia sizemoreae Kiew (2004)
* Begonia skutchii Burt-Utley & Utley (2014)
* Begonia sleumeri L.B.Sm. & B.G.Schub. (1955)
* Begonia smilacina A.DC. (1859)
* Begonia smithiae Geddes (1928)
* Begonia smithiana T.T.Yu ex Irmsch. (1951)
* Begonia socia Craib (1930)
* Begonia socotrana Hook.f., Gard. Chron., n.s. (1881)
* Begonia sodiroi C.DC. (1908)
* Begonia sogerensis Ridl. (1914)
* Begonia solananthera A.DC. (1859)
* Begonia solimutata L.B.Sm. & Wassh. (1990)
* Begonia solitudinis Brade (1958)
* Begonia soluta Craib (1930)
* Begonia somervillei Hemsl. (1896)
* Begonia sonderiana Irmsch. (1961)
* Begonia sonlaensis Aver. (2012)
* Begonia sootepensis Craib (1911)
* Begonia soror Irmsch. (1953)
* Begonia sosefiana J.J.de Wilde & Valk. (2005)
* Begonia sousae Burt-Utley (1983)
* Begonia spadiciflora L.B.Sm. & B.G.Schub. (1946)
* Begonia sparreana L.B.Sm. & Wassh. (1979)
* Begonia sparsipila Baker (1873)
* Begonia speculum Moonlight & Tebbitt (2017 publ. 2016)
* Begonia speluncae Ridl. (1906)
* Begonia sphenantheroides C.I Peng (2015)
* Begonia sphenocarpa Irmsch. (1913)
* Begonia spilotophylla F.Muell. (1876)
* Begonia spinibarbis Irmsch. (1957)
* Begonia squamipes Irmsch. (1953)
* Begonia squamulosa Hook.f. (1871)
* Begonia squarrosa Liebm. (1852)
* Begonia staudtii Gilg (1904)
* Begonia stellata Sosef (1991 publ. 1992)
* Begonia stenocardia L.B.Sm. & B.G.Schub. (1946)
* Begonia stenogyna Sands (1996 publ. 1997)
* Begonia stenolepis L.B.Sm. & R.C.Sm. (1971)
* Begonia stenophylla A.DC. (1859)
* Begonia stenotepala L.B.Sm. & B.G.Schub. (1941)
* Begonia stevei M.Hughes (2006)
* Begonia steyermarkii L.B.Sm. & B.G.Schub. (1955)
* Begonia stichochaete K.G.Pearce (2003)
* Begonia stictopoda (Miq.) Miq. ex A.DC. (1864)
* Begonia stigmosa Lindl. (1845)
* Begonia stilandra Merr. & L.M.Perry (1943)
* Begonia stipularis Spreng. (1801)
* Begonia stolzii Irmsch. (1961)
* Begonia strachwitzii Warb. ex Irmsch. (1913)
* Begonia strictinervis Irmsch. (1913)
* Begonia strictipetiolaris Irmsch. (1913)
* Begonia strigillosa A.Dietr. (1851)
* Begonia strigosa (Warb.) L.L.Forrest & Hollingsw. (2003)
* Begonia strigulosa (Hassk.) A.DC. (1864)
* Begonia subacida Irmsch. (1959)
* Begonia subacutata De Wild. (1908)
* Begonia subalpestris A.Chev. (1912)
* Begonia subcaudata Rusby ex L.B.Sm. & Schub. (1944 publ. 1945)
* Begonia subciliata A.DC. (1859)
* Begonia subcoriacea C.I Peng, Yan Liu & S.M.Ku (2008)
* Begonia subcostata Rusby (1920)
* Begonia subcyclophylla Irmsch. (1913)
* Begonia subelliptica Merr. & L.M.Perry (1943)
* Begonia subhowii S.H.Huang (1999)
* Begonia subisensis K.G.Pearce (2003)
* Begonia sublobata Jack (1822)
* Begonia sublongipes Y.M.Shui (2004)
* Begonia subnummularifolia Merr. (1926)
* Begonia suboblata D.Fang & D.H.Qin (2004)
* Begonia suborbiculata Merr. (1911 publ. 1912)
* Begonia subpeltata Wight (1852)
* Begonia subperfoliata Parish ex Kurz, J. (1873)
* Begonia subprostrata Merr. (1925)
* Begonia subscutata De Wild. (1908)
* Begonia subspinulosa Irmsch. (1949)
* Begonia subtruncata Merr. (1911 publ. 1912)
* Begonia subvillosa Klotzsch (1855)
* Begonia subviridis Craib (1930)
* Begonia sudjanae C.-A.Jansson (1963)
* Begonia suffrutescens Merr. & L.M.Perry (1943)
* Begonia sukutensis Burt-Utley & Utley (2012)
* Begonia sumbawaensis Girm. (2016)
* Begonia summoglabra T.T.Yu (1948)
* Begonia sunorchis C.Chev. (1938)
* Begonia superciliaris C.W.Lin & C.I Peng (2017)
* Begonia suprafastigiata Irmsch. (1949)
* Begonia surculigera Kurz (1871)
* Begonia susaniae Sosef (1991 publ. 1992)
* Begonia sutherlandii Hook.f. (1868)
* Begonia sychnantha L.B.Sm. & Wassh. (1984)
* Begonia sykakiengii Rubite, C.I Peng, C.W.Lin & K.F.Chung (2017)
* Begonia sylvatica A.DC. (1864)
* Begonia sylvestris A.DC. (1859)
* Begonia symbeccarii L.L.Forrest & Hollingsw. (2003)
* Begonia symbracteosa L.L.Forrest & Hollingsw. (2003)
* Begonia symgeraniifolia L.L.Forrest & Hollingsw. (2003)
* Begonia symhirta L.L.Forrest & Hollingsw. (2003)
* Begonia sympapuana L.L.Forrest & Hollingsw. (2003)
* Begonia symparvifolia L.L.Forrest & Hollingsw. (2003)
* Begonia sympodialis Irmsch. (1953 publ. 1954)
* Begonia symsanguinea L.L.Forrest & Hollingsw. (2003)

### T

* Begonia thelmae
* Begonia tacana Ziesenh. (1971)
* Begonia tafaensis Merr. & L.M.Perry (1943)
* Begonia tafiensis Lillo (1919)
* Begonia tagbanua M.Hughes, C.I Peng & Rubite (2015)
* Begonia ×taipeiensis C.I.Peng (2000)
* Begonia taiwaniana Hayata (1911)
* Begonia taliensis Gagnep. (1919)
* Begonia taligera S.Rajbh. (2010)
* Begonia tambelanensis (Irmsch.) Kiew (2003)
* Begonia tamdaoensis C.I Peng (2015)
* Begonia tampinica Burkill ex Irmsch. (1929)
* Begonia tanala Humbert (1972)
* Begonia tandangii C.I.Peng & Rubite (2013)
* Begonia taniana Guanih (2015)
* Begonia tapatia Burt-Utley & McVaugh (2001)
* Begonia taraw C.I Peng, Rubite & M.Hughes (2015)
* Begonia tarokoensis M.J.Lai (1990)
* Begonia tatoniana R.Wilczek (1969)
* Begonia tawaensis Merr. (1929)
* Begonia tayabensis Merr. (1918)
* Begonia tayloriana Irmsch. (1961)
* Begonia tebiang S.Julia & Kiew (2016)
* Begonia temburongensis Sands (1996 publ. 1997)
* Begonia tenasserimensis Phutthai & M.Hughes (2017)
* Begonia tenera Dryand. (1791)
* Begonia tenericaulis Ridl. (1925)
* Begonia tengchiana C.I Peng & Y.K.Chen (2005)
* Begonia tenuifolia Dryand. (1791)
* Begonia tenuis Burt-Utley & Utley (2012)
* Begonia tenuissima S.Julia & C.Y.Ling (2015)
* Begonia tepuiensis Moonlight & Jara (2017)
* Begonia tessaricarpa C.B.Clarke (1879)
* Begonia tetralobata Y.M.Shui (2007)
* Begonia tetrandra Irmsch. (1949)
* Begonia teuscheri Linden ex André (1879)
* Begonia teysmanniana (Miq.) Miq. ex B.D.Jacks. (1895)
* Begonia thaipingensis King, J. (1902)
* Begonia thelmae L.B.Sm. & Wassh. (1981)
* Begonia thiemei C.DC. (1895)
* Begonia thomeana C.DC. (1892)
* Begonia thomsonii A.DC. (1859)
* Begonia thyrsoidea Irmsch. (1949)
* Begonia tigrina Kiew (2005)
* Begonia tiliifolia C.DC. (1908)
* Begonia timorensis (Miq.) Golding & Kareg. (1984)
* Begonia tindan Rimi & Kinahim (2015)
* Begonia tinjanii S.Julia (2016)
* Begonia titoevangelistae Tandang & Rubite (2016)
* Begonia tlapensis Burt-Utley & Utley (2014)
* Begonia togashii Nob.Tanaka & C.I Peng (2016)
* Begonia toledana L.B.Sm. & B.G.Schub. (1946)
* Begonia toledoana Handro (1969)
* Begonia tomaniensis Rimi (2015)
* Begonia tomentosa Schott (1827)
* Begonia tonduzii C.DC. ex T.Durand & Pittier (1896)
* Begonia tonkinensis Gagnep. (1919)
* Begonia torajana D.C.Thomas & Ardi (2011)
* Begonia torricellensis Warb. (1905)
* Begonia trianae (A.DC.) Warb. (1894)
* Begonia triangularis Kiew & C.Y.Ling (2016)
* Begonia tribenensis C.R.Rao (1969)
* Begonia tribracteata Irmsch. (1949)
* Begonia trichocarpa Dalzell (1851)
* Begonia trichochila Warb. (1904)
* Begonia trichopoda (Miq.) Miq. (1858)
* Begonia trichosepala C.DC. (1895)
* Begonia tricuspidata C.B.Clarke (1879)
* Begonia triginticollium Girm. (2012)
* Begonia trigonocarpa Ridl. (1917)
* Begonia triradiata C.B.Clarke (1879)
* Begonia trispathulata (A.DC.) Warb. (1894)
* Begonia tropaeolifolia A.DC. (1859)
* Begonia trujillensis L.B.Sm. (1973)
* Begonia trullifolia Guillaumin (1923)
* Begonia truncatiloba Irmsch. (1939)
* Begonia truncicola Sodiro ex C.DC. (1908)
* Begonia tsaii Irmsch. (1951)
* Begonia tsaratananensis Aymonin & Bosser (1983)
* Begonia tsimihety Humbert (1972)
* Begonia tsoongii C.Y.Wu (1995)
* Begonia tuberculosa Girm. (2009)
* Begonia tumbezensis Irmsch. (1953)
* Begonia turbinata Ridl. (1917)
* Begonia turrialbae Burt-Utley & Utley (1999)

### U

* Begonia undulata
* Begonia ubahribuensis S.Julia & Kiew (2016)
* Begonia udisilvestris C.DC. (1919)
* Begonia ulmifolia Willd. (1805)
* Begonia umbellata Kunth (1825)
* Begonia umbraculifera Hook.f. (1896)
* Begonia umbraculifolia Y.Wan & B.N.Chang (1987)
* Begonia umbratica S.Julia (2013)
* Begonia unduavensis Rusby (1920)
* Begonia undulata Schott (1827)
* Begonia uniflora S.Watson (1890)
* Begonia unilateralia Rusby (1934)
* Begonia urdanetensis Elmer (1915)
* Begonia urophylla Hook. (1855)
* Begonia ursina L.B.Sm. & B.G.Schub. (1946)
* Begonia urticae L.f. (1782)
* Begonia uruapensis Sessé & Moc. (1890)
* Begonia urubambensis Tebbitt (2016)
* Begonia urunensis Kiew (2016)

### V

* Begonia venosa
* Begonia vaccinioides Sands (2001)
* Begonia vagans Craib (1930)
* Begonia valdensium A.DC. (1859)
* Begonia vallicola Kiew (2005)
* Begonia valvata L.B.Sm. & B.G.Schub. (1952)
* Begonia vanderentii Rossiti (2015)
* Begonia vandewateri Ridl. (1916)
* Begonia vankerckhovenii De Wild. (1915)
* Begonia vanoverberghii Merr. (1911 publ. 1912)
* Begonia vareschii Irmsch. (1959)
* Begonia variabilis Ridl. (1911)
* Begonia variegata Y.M.Shui & W.H.Chen (2005)
* Begonia variifolia Y.M.Shui & W.H.Chen (2005)
* Begonia varipeltata D.C.Thomas (2008)
* Begonia varistyle Irmsch. (1953)
* Begonia veitchii Hook.f. (1867)
* Begonia velata L.B.Sm. & B.G.Schub. (1941)
* Begonia velloziana Walp. (1843)
* Begonia venosa Skan ex Hook.f. (1899)
* Begonia venusta King, J. (1902)
* Begonia verecunda M.Hughes (2009)
* Begonia vermeulenii D.C.Thomas (2011)
* Begonia verruculosa L.B.Sm. (1973)
* Begonia versicolor Irmsch. (1939)
* Begonia vespipropinqua Chong (2015)
* Begonia vestita C.DC. (1908)
* Begonia vicina Irmsch. (1953)
* Begonia vietnamensis H.Q.Nguyen & C.I Peng (2010)
* Begonia villifolia Irmsch. (1951)
* Begonia vincentina O.E.Schulz (1911)
* Begonia violifolia A.DC. (1859)
* Begonia viridiflora A.DC. (1859)
* Begonia viscida Ziesenh. (1969)
* Begonia viscosa Aver. & H.Q.Nguyen (2012)
* Begonia vitiensis A.C.Sm. (1936)
* Begonia vittariifolia N.Hallé (1972)
* Begonia vuijckii Koord. (1912)
* Begonia vulgaris S.Julia & Kiew (2013)

### W

* Begonia wrightiana
* Begonia wadei Merr. & Quisumb. (1932)
* Begonia wageneriana (Klotzsch) Hook. (1857)
* Begonia wakefieldii Gilg ex Engl. (1921)
* Begonia wallacei C.W.Lin & C.I Peng (2017)
* Begonia wallichiana Lehm. (1850)
* Begonia walteriana Irmsch. (1964)
* Begonia wangii T.T.Yu (1948)
* Begonia warburgii K.Schum. & Lauterb. (1900)
* Begonia wariana Irmsch. (1913)
* Begonia wasshauseniana L.Kollmann & Peixoto (2012)
* Begonia wattii C.B.Clarke (1889)
* Begonia watuwilensis Girm. (2009)
* Begonia weberbaueri Irmsch. (1953)
* Begonia weberi Merr. (1911 publ. 1912)
* Begonia weberlingii Irmsch. ex Weberling (1963)
* Begonia weddeliana A.DC. (1859)
* Begonia weigallii Hemsl. (1896)
* Begonia wengeri C.E.C.Fisch. (1932)
* Begonia wenshanensis C.M.Hu (1995)
* Begonia wenzelii Merr. (1915)
* Begonia wilburii Burt-Utley & Utley (2012)
* Begonia wilkiei Coyle (2010)
* Begonia wilksii Sosef (1991 publ. 1992)
* Begonia wilsonii Gagnep. (1919)
* Begonia windischii L.B.Sm. ex S.F.Sm. & Wassh. (1999)
* Begonia wollastonii Baker f. (1908)
* Begonia wollnyi Herzog (1909)
* Begonia woodii Merr. (1925)
* Begonia wrayi Hemsl. (1887)
* Begonia wrightiana A.DC. (1859)
* Begonia wui-senioris C.I Peng (2014)
* Begonia wurdackii L.B.Sm. & B.G.Schub. (1963)
* Begonia wutaiana C.I Peng & Y.K.Chen (2005)
* Begonia wuzhishanensis C.I Peng, X.H.Jin & S.M.Ku (2014)
* Begonia wyepingiana Kiew (2005)

### X

* Begonia xanthina Hook. (1852)
* Begonia xilitlensis Burt-Utley (1984)
* Begonia xingyiensis T.C.Ku (1995)
* Begonia xinyiensis T.C.Ku (1995)
* Begonia xiphophylla Irmsch. (1953)
* Begonia xiphophylloides Kiew (2013)
* Begonia xishuiensis T.C.Ku (1995)
* Begonia xylopoda L.B.Sm. & B.G.Schub. (1946)

### Y

* Begonia yapenensis M.Hughes (2015)
* Begonia yappii Ridl. (1929)
* Begonia yiii Kiew & S.Julia (2013)
* Begonia yingjiangensis S.H.Huang (1999)
* Begonia yishanensis T.C.Ku (1999)
* Begonia ynesiae L.B.Sm. & Wassh. (1979)
* Begonia yui Irmsch. (1951)
* Begonia yunckeri Standl. (1938)

### Z

* Begonia zairensis Sosef (1991 publ. 1992)
* Begonia zamboangensis Merr. (1925)
* Begonia zenkeriana L.B.Sm. & Wassh. (1984)
* Begonia zhangii D.Fang & D.H.Qin (2004)
* Begonia zhengyiana Y.M.Shui (2002)
* Begonia zimmermannii Peter ex Irmsch. (1961)
* Begonia zollingeriana (Klotzsch) A.DC. (1859)
Selon Tropicos (8 juillet 2018) (Attention liste brute contenant possiblement des synonymes) :
* Begonia 'zip' hort.
* Begonia abaculoides Ziesenh.
* Begonia abbottii Urb.
* Begonia abbreviata C.I Peng
* Begonia abdullahpieei Kiew
* Begonia aberrans Irmsch.
* Begonia aborensis Dunn
* Begonia abyssinica Cufod.
* Begonia acaulis Merr. & L.M. Perry
* Begonia acerifolia Kunth
* Begonia aceroides Irmsch.
* Begonia acetosa Vell.
* Begonia acetosella Craib
* Begonia acida Mart. ex DC.
* Begonia aconitifolia A. DC.
* Begonia acrensis Irmsch.
* Begonia aculeata Walp.
* Begonia acuminata Dryand.
* Begonia acuminatissima Merr.
* Begonia acutangula L.H. Bailey & E.Z. Bailey
* Begonia acutifolia Jacq.
* Begonia acutiloba Liebm.
* Begonia acutitepala K.Y. Guan & D.K. Tian
* Begonia adenodes Irmsch.
* Begonia adenopoda Lem.
* Begonia adenostegia Stapf
* Begonia adiantiformis Toledo
* Begonia admirabilis Brade
* Begonia adolfi-friderici Gilg ex Mildbr.
* Begonia adpressa Sosef
* Begonia adscendens C.B. Clarke
* Begonia aenea Linden & André
* Begonia aequata A. Gray
* Begonia aequatoguineensis Sosef & Nguema
* Begonia aequatorialis L.B. Sm. & B.G. Schub.
* Begonia aequilateralis Irmsch.
* Begonia aeranthos L.B. Sm. & B.G. Schub.
* Begonia affinis Merr.
* Begonia afrakensis (Gibbs) L.L. Forrest & Hollingsw.
* Begonia aggeloptera N. Hallé
* Begonia agrial Rojas Acosta
* Begonia aguabuenensis Burt-Utley & Utley
* Begonia aguiabrancensis Kollmann
* Begonia agusanensis Merr.
* Begonia alba Merr.
* Begonia alba-coccinea hort.
* Begonia albido-setulosa Hassk.
* Begonia albidula Brade
* Begonia albiflora hort. ex Klotzsch
* Begonia albo-coccinea Hook.
* Begonia albobracteata Ridl.
* Begonia albococcinea Hook.
* Begonia albomaculata C. DC.
* Begonia albopicta W. Bull
* Begonia alcarrasica J. Sierra
* Begonia alchemilloides Meisn. ex A. DC.
* Begonia alemanii Brade
* Begonia alepensis A. Chev.
* Begonia algaia L.B. Sm. & Wassh.
* Begonia alice-clarkiae Ziesenh.
* Begonia aliciae C.E.C. Fisch.
* Begonia alicida C.B. Clarke ex Hook. f.
* Begonia allenii Standl.
* Begonia almedana Burt-Utley & Utley
* Begonia alnifolia A. DC.
* Begonia alpina L.B. Sm. & Wassh.
* Begonia altamiroi Brade
* Begonia altissima Ridl.
* Begonia altoperuviana A. DC.
* Begonia alvarezii Merr.
* Begonia alveolata T.T. Yu
* Begonia amabilis Linden
* Begonia amoena Wall.
* Begonia amphioxus Sands
* Begonia ampla Hook. f.
* Begonia anaimalaiensis Bedd.
* Begonia anamalayana Bedd.
* Begonia anceps Irmsch.
* Begonia andamensis Parish ex C.B. Clarke
* Begonia andersonii Kiew & S.Julia
* Begonia andina Rusby
* Begonia andreana Sprague
* Begonia androrangensis Humbert ex Keraudren & Bosser
* Begonia anemoniflora Irmsch.
* Begonia anemonoides Azara
* Begonia angilogensis Merr.
* Begonia angolensis Irmsch.
* Begonia angraensis Brade
* Begonia angularis Raddi
* Begonia angulata Vell.
* Begonia angustifoia Hemsl.
* Begonia angustifolia A. DC.
* Begonia angustilimba Merr.
* Begonia angustiloba A. DC.
* Begonia anisoptera Merr.
* Begonia anisosepala Hook. f.
* Begonia anjuanensis Humbert ex Keraudren & Boss.
* Begonia ankaranensis Humbert ex Keraudren & Bosser
* Begonia annobonensis A. DC.
* Begonia annulata K. Koch
* Begonia anodaefolia A. DC.
* Begonia anodifolia A. DC.
* Begonia antaisaka Humbert ex Keraudren & Bosser
* Begonia anthonyi Kiew
* Begonia antioquensis (A. DC.) Warb.
* Begonia antongilensis Humbert ex Keraudren & Bosser
* Begonia antsingyensis Humbert ex Keraudren & Bosser
* Begonia antsiranensis Aymonin & Bosser
* Begonia apayaoensis Merr.
* Begonia apparicioi Brade
* Begonia aptera Blume
* Begonia arachnoidea C.I Peng, Yan Liu & S.M. Ku
* Begonia arborescens Raddi
* Begonia arboreta Y.M. Shui
* Begonia archboldiana Merr. & Perry
* Begonia areolata Miq.
* Begonia arfakensis (Gibbs) L.L.Forrest & Hollingsw.
* Begonia argentea Linden
* Begonia argenteomarginata Tebbitt
* Begonia argentinensis Speg.
* Begonia argyrocoelis Hérincq
* Begonia argyrostigma Fisch. ex Link & Otto
* Begonia aridicaulis Ziesenh.
* Begonia arnottiana DC.
* Begonia arrogans Irmsch.
* Begonia articulata Irmsch.
* Begonia artior Irmsch.
* Begonia asarifolia Liebm.
* Begonia asperifolia Irmsch.
* Begonia aspleniifolia Hook. f. ex DC.
* Begonia assamica Linden ex Pynaert
* Begonia assurgens Irmsch.
* Begonia asteroides L.B. Sm. & B.G. Schub.
* Begonia asteropyrifolia Y.M. Shui & W.H. Chen
* Begonia asympeltata L.B. Sm. & Wassh.
* Begonia atricha DC.
* Begonia atroglandulosa Sosef
* Begonia attenuata (Klotzsch) A. DC.
* Begonia aucibifolia hort. ex Klotzsch
* Begonia augustae Irmsch.
* Begonia augustinei Hemsl.
* Begonia aurantiaca hort. ex Planch.
* Begonia aurantiflora C.I Peng, Yan Liu & S.M. Ku
* Begonia auriculata Hook. f.
* Begonia auritistipula Y.M. Shui & W.H. Chen
* Begonia austroguangxiensis Y.M. Shui & W.H. Chen
* Begonia austrotaiwanensis Y.K. Chen & C.I Peng
* Begonia awongii Sands
* Begonia axillaris Ridl.
* Begonia axillipara Ridl.
* Begonia azuensis Urb. & Ekman
* Begonia baccata Hook. f.
* Begonia bagotiana Humbert ex Keraudren
* Begonia bahakensis Sands
* Begonia bahiensis A. DC.
* Begonia bakeri C. DC.
* Begonia balansae C. DC.
* Begonia balansana Gagnep.
* Begonia balmisiana Balmis
* Begonia bamaensis Yan Liu & C.I Peng
* Begonia banaoensis J. Sierra
* Begonia bangii Kuntze
* Begonia barahonensis (O.E. Schulz) Urb.
* Begonia baramensis Merr.
* Begonia barbana C. DC.
* Begonia barbata Wall.
* Begonia barbellata Ridl.
* Begonia barborkae Halda
* Begonia barkeri Knowles & Westc.
* Begonia barkleyana L.B. Sm.
* Begonia baronii Baker
* Begonia barrigae L.B. Sm. & B.G. Schub.
* Begonia barsalouxiae Standl. & L.O. Williams
* Begonia bartlettiana Merr. & L.M. Perry
* Begonia bataiensis Kiew
* Begonia batesii C. DC.
* Begonia baturongensis Kiew
* Begonia bauensis Brade
* Begonia baumannii Lemoine
* Begonia baviensis Gagnep.
* Begonia beccariana Ridl.
* Begonia beccarii Warb.
* Begonia beddomei Hook. f.
* Begonia bekopakensis Aymonin & Bosser
* Begonia bellii H. Lév.
* Begonia bequaertii Robyns & Lawalrée
* Begonia berhamanii Kiew
* Begonia bernieri A. DC.
* Begonia beryllae Ridl.
* Begonia besleriifolia Schott
* Begonia betsimisaraka Humbert ex Keraudren & Bosser
* Begonia bettinae Ziesenh.
* Begonia bhotanensis hort.
* Begonia bicolor S. Watson
* Begonia bidentata Raddi
* Begonia biflora T.C. Ku
* Begonia bifolia Ridl.
* Begonia bifurcata L.B. Sm. & B.G. Schub.
* Begonia biguassuensis Brade
* Begonia biliranensis Merr.
* Begonia bilocularis
* Begonia binotii hort. ex C. Chev.
* Begonia binuangensis Merr.
* Begonia biolleyi C. DC.
* Begonia bipetala G. Lodd.
* Begonia bipindensis Gilg ex Engl.
* Begonia bipinnatifida J.J. Sm.
* Begonia biserrata Lindl.
* Begonia bismarckiana Veitch
* Begonia bissei Sierra
* Begonia blumenaviensis Irmsch.
* Begonia bogneri Ziesenh.
* Begonia boisiana Gagnep.
* Begonia boissieri A. DC.
* Begonia boiviana A. DC.
* Begonia boiviniana A. DC.
* Begonia boliviensis A. DC.
* Begonia bolleana Urb. & Ekman
* Begonia bolsteri Merr.
* Begonia bombycina Blume
* Begonia bonii Gagnep.
* Begonia bonitoensis Brade
* Begonia bonthainensis Hemsl.
* Begonia bonus-henricus J.J. de Wilde
* Begonia boqueronensis Burt-Utley & Utley
* Begonia boquetensis Irmsch.
* Begonia boraceinsis Handro
* Begonia boreoharlingii Tebbitt & Moonlight
* Begonia borneensis A. DC.
* Begonia bosseri Keraudren
* Begonia botryoides Moonlight & Tebbitt
* Begonia boucheana A. DC.
* Begonia bouffordii C.I Peng
* Begonia bowerae Ziesenh.
* Begonia bowringiana Champ. ex Benth.
* Begonia brachybotrys Merr. & L.M. Perry
* Begonia brachyclada Urb. & Ekman
* Begonia brachypoda O.E. Schulz
* Begonia brachyptera Hayata
* Begonia bracteata Jack
* Begonia bracteosa A. DC.
* Begonia bradei Irmsch.
* Begonia brandbygeana L.B. Sm. & Wassh.
* Begonia brandisiana Kurz
* Begonia brasila DC.
* Begonia brasiliana Schrank ex Steud.
* Begonia brasiliensis Klotzsch
* Begonia brassii Merr. & G. Perry
* Begonia breedlovei Burt-Utley
* Begonia bretschneideriana Hemsl.
* Begonia brevibracteata Kupicha
* Begonia brevicaulis A. DC.
* Begonia brevicordata L.B. Sm. & B.G. Schub.
* Begonia brevicyma C. DC.
* Begonia brevilobata Irmsch.
* Begonia brevipedunculata Y.M. Shui
* Begonia brevipes Merr.
* Begonia brevipetala (A. DC.) Warb.
* Begonia brevirimosa Irmsch.
* Begonia brevisetulosa C.Y. Wu
* Begonia bridgesii A. DC.
* Begonia brongniartiana Lem.
* Begonia brongniartii Lem.
* Begonia brooksii hort.
* Begonia broussonetiifolia A. DC.
* Begonia bruneelii De Wild.
* Begonia bruneiana Sands
* Begonia buchholzii Gilg
* Begonia buchtienii Irmsch.
* Begonia buddleiifolia A. DC.
* Begonia bufoderma L.B. Sm. & Wassh.
* Begonia buimontana Yamam.
* Begonia bulbifera Lodd. ex Otto & A. Dietr.
* Begonia bulbillifera Link, Klotzsch & Otto
* Begonia bulbosa H. Lév.
* Begonia bullata Urb. & Ekman
* Begonia bullatifolia L. Kollmann
* Begonia bulusanensis Elmer ex Merr.
* Begonia burbidgei Stapf
* Begonia burkei hort.
* Begonia burkillii Dunn
* Begonia burle-marxii Brade
* Begonia burmensis L.B. Sm. & Wassh.
* Begonia burttii Kiew & S.Julia
* Begonia buseyi Burt-Utley
* Begonia buttonii Irmsch.
* Begonia cacauicola L.B. Sm. ex S.F. Sm. & Wassh.
* Begonia caespitosa Jack
* Begonia caffra Meisn.
* Begonia calabarica Stapf
* Begonia calcarea Ridl.
* Begonia calcicola Merr.
* Begonia calciphylla hort. ex Houlston
* Begonia calderonii Standl.
* Begonia californica Brandegee
* Begonia calliantha Merr. & Perry
* Begonia callosa L. Kollmann
* Begonia calophylla Gilg ex Engl.
* Begonia calvescens (Brade ex L.B. Sm. & R.C. Sm.) E.L. Jacques & Mamede
* Begonia calzadae Burt-Utley & Utley
* Begonia cameroonensis L.B. Sm. & Wassh.
* Begonia camiguinensis Elmer
* Begonia campanensis Burt-Utley & Utley
* Begonia campos-portoana Brade
* Begonia canaliculata Brade
* Begonia canarana Miq.
* Begonia candicans Graham
* Begonia candollei Ziesenh.
* Begonia cantareira hort.
* Begonia capanemae Brade
* Begonia caparaoensis E.L. Jacques & L. Kollmann
* Begonia capensis Blanco
* Begonia capillipes Gilg
* Begonia capituliformis Irmsch.
* Begonia caraguatatubensis Brade
* Begonia cardiocarpa Liebm.
* Begonia cardiophora Irmsch.
* Begonia cariocana Brade
* Begonia carletonii Standl.
* Begonia carnosa Teijsm. & Binn.
* Begonia carnosula Ridl.
* Begonia caroliniifolia Regel
* Begonia carollina F.A. Barkley & Golding
* Begonia carpinifolia Liebm.
* Begonia carrieae Ziesenh.
* Begonia casiguranensis Quisumb. & Merr.
* Begonia caslerima F.A. Barkley & Golding
* Begonia castaneifolia Otto & A. Dietr.
* Begonia castilloi Merr.
* Begonia cataractarum J. Braun & K. Schumacher
* Begonia catharinensis Brade
* Begonia cathayana Hemsl.
* Begonia cathcartii Hook. f. & Thomson
* Begonia caudata Merr.
* Begonia caudilimba C. DC.
* Begonia cauliflora Sands
* Begonia cavaleriei H. Lév.
* Begonia cavallyensis A. Chev.
* Begonia cavum Ziesenh.
* Begonia cebadillensis Houghton ex L.B. Sm. & B.G. Schub.
* Begonia cehengensis T.C. Ku
* Begonia celebica Irmsch.
* Begonia cerasiphylla L.B. Sm. & Wassh.
* Begonia ceratocarpa S.H. Huang & Y.M. Shui
* Begonia chaetocarpa Kuntze
* Begonia chaiana Kiew & S.Julia
* Begonia chapecoensis Brade
* Begonia charadrophila Tutin
* Begonia chemillenensis Moonlight
* Begonia chepoensis C. DC.
* Begonia chevalieri Warb. ex A. Chev.
* Begonia chiapensis Burt-Utley
* Begonia chiasmogyna M. Hughes
* Begonia chimborazo hort.
* Begonia chingii Irmsch.
* Begonia chingipengii Rubite
* Begonia chiriquensis Standl.
* Begonia chiriquina C. DC.
* Begonia chishuiensis T.C. Ku
* Begonia chitoensis T.S. Liu & M.J. Lai
* Begonia chivatoa Ziesenh.
* Begonia chlorandra Sands
* Begonia chlorocarpa Irmsch. ex Sands
* Begonia chlorolepis L.B. Sm. & B.G. Schub.
* Begonia chloroneura P. Wilkie & Sands
* Begonia chlorosticta Sands
* Begonia chongii Sands
* Begonia chrysantha Tebbitt
* Begonia chuniana C.Y. Wu
* Begonia chuyunshanensis C.I Peng & Y.K. Chen
* Begonia cilatobracteata Engl.
* Begonia ciliata Kunth
* Begonia cilibracteola C. DC.
* Begonia ciliifera Merr.
* Begonia ciliobracteata Warb.
* Begonia cincinnifera Irmsch.
* Begonia cinnabarina Hook.
* Begonia circumlobata Hance
* Begonia cirrosa L.B. Sm. & Wassh.
* Begonia cladocarpa Baker
* Begonia cladocarpoides Humbert ex Aymonin & Bosser
* Begonia cladotricha M. Hughes
* Begonia clarkei Hook. f.
* Begonia clavicaulis Irmsch.
* Begonia clemensiae Merr. & L.M. Perry
* Begonia clivalis Ridl.
* Begonia clypeifolia Hook. f.
* Begonia cobana C. DC.
* Begonia coccinea Hook.
* Begonia coelocentroides Y.M. Shui & Z.D. Wei
* Begonia cognata Irmsch.
* Begonia collaris Brade
* Begonia collina Irmsch.
* Begonia collisiae Merr.
* Begonia colombiana L.B. Sm. & B.G. Schub.
* Begonia colorata Warb.
* Begonia columnaris Benth.
* Begonia comata Kuntze
* Begonia comorensis A. DC. ex Warb.
* Begonia compacticaulis Irmsch.
* Begonia comperei R. Wilczek
* Begonia complicata A. DC.
* Begonia compta W. Bull
* Begonia concanensis A. DC.
* Begonia conchifolia A. Dietr.
* Begonia concinna Schott
* Begonia confertiflora Gardner
* Begonia confinis L.B. Sm. & Wassh.
* Begonia confusa L.B. Sm. & B.G. Schub.
* Begonia congesta Ridl.
* Begonia conipila Irmsch. ex Kiew
* Begonia conraui Gilg
* Begonia consanguinea Merr.
* Begonia consobrina Irmsch.
* Begonia contracta Warb.
* Begonia convallariodora C. DC.
* Begonia convolvulacea (Klotzsch) A. DC.
* Begonia cooperi C. DC.
* Begonia copelandii Merr.
* Begonia copeyana C. DC.
* Begonia coptidifolia H.G. Ye, F.G. Wang, Y.S. Ye & C.I Peng
* Begonia coptidimontana C.Y. Wu
* Begonia corallina Carrière
* Begonia cordata Vell.
* Begonia cordifolia (Wight) Thwaites
* Begonia coriacea A. DC.
* Begonia corneri Kiew
* Begonia cornitepala Irmsch.
* Begonia cornuta L.B. Sm. & B.G. Schub.
* Begonia coronensis Merr.
* Begonia corredorana C. DC.
* Begonia corrugata Kiew & S.Julia
* Begonia corzoensis Ziesenh.
* Begonia coursii Humbert ex Keraudren
* Begonia cowellii Nash
* Begonia crassicaulis Lindl.
* Begonia crassipes Gilg ex Engl.
* Begonia crassirostris Irmsch.
* Begonia crassisetulosa F.A. Barkley & Golding
* Begonia crateris Exell
* Begonia cremnophila Tebbitt
* Begonia crenata Dryand.
* Begonia crenatiflora (Klotzsch & Putz.) A. DC.
* Begonia crenatifolia A. DC.
* Begonia crenulata Schott ex A. DC.
* Begonia crinita Oliv. ex Hook. f.
* Begonia crispa
* Begonia crispipila Elmer
* Begonia crispula Brade
* Begonia cristata Warb. ex Koord.
* Begonia cristobalensis Ziesenh.
* Begonia croatii Burt-Utley
* Begonia crocea C.I Peng
* Begonia cruentia Graham ex Steud.
* Begonia cryptocarpa L.B. Sm. & B.G. Schub.
* Begonia crystallina Y.M. Shui & W.H. Chen
* Begonia cuatrecasasiana L.B. Sm. & B.G. Schub.
* Begonia cubensis Hassk.
* Begonia cubincola A. DC.
* Begonia cucphuongensis H.Q. Nguyen & Tebbitt
* Begonia cucullata Willd.
* Begonia cucullifolia Hassk.
* Begonia cucurbitifolia C.Y. Wu
* Begonia cuernavacensis Ziesenh.
* Begonia cultrata Irmsch.
* Begonia cumingiana DC.
* Begonia cumingii A. Gray
* Begonia cuneata Walp.
* Begonia cuneatifolia Irmsch.
* Begonia cuninghamei Sprague
* Begonia cunreata Walp.
* Begonia cupreata Henriq.
* Begonia curtii L.B. Sm. & B.G. Schub.
* Begonia curtisii Ridl.
* Begonia curvicarpa S.M. Ku, C.I Peng & Yan Liu
* Begonia cuspidata C. DC.
* Begonia cyanescens Sands
* Begonia cyathophora Poepp. & Endl.
* Begonia cyclophylla Hook. f.
* Begonia cylindrata L.B. Sm. & B.G. Schub.
* Begonia cylindrica D.R. Liang & X.X. Chen
* Begonia cylindricaulis Brade
* Begonia cymbalifera L.B. Sm. & B.G. Schub.
* Begonia daedalea Lem.
* Begonia dasycarpa A. DC.
* Begonia dasypoda Meisn. ex A. DC.
* Begonia daveauiana Godefroy
* Begonia davidsoniae Standl. ex L.B. Sm. & B.G. Schub.
* Begonia davisii Veitch ex Hook. f.
* Begonia daweishanensis S.H. Huang & Y.M. Shui
* Begonia daxinensis T.C. Ku
* Begonia dayi hort.
* Begonia dealbata Liebm.
* Begonia debaoensis C.I Peng, Yan Liu & S.M. Ku
* Begonia debilis King
* Begonia decaisneana Gagnep.
* Begonia decandra Pav. ex A. DC.
* Begonia decaryana Humbert ex Keraudren & Bosser
* Begonia declinata Vell.
* Begonia decora Stapf
* Begonia delavayi Gagnep.
* Begonia delicatula C.S.P. Parish ex C.B. Clarke
* Begonia deliciosa Linden ex Fotsch
* Begonia demissa Craib
* Begonia densifolia Irmsch.
* Begonia densiretis Irmsch.
* Begonia dentata Pav. ex A. DC.
* Begonia dentatiloba A. DC.
* Begonia dentatobracteata C.Y. Wu
* Begonia denticulata Kunth
* Begonia depauperata Schott
* Begonia deryckxiana Lem.
* Begonia descoleana L.B. Sm. & B.G. Schub.
* Begonia dewildei Sosef
* Begonia diadema Linden ex Rodigas
* Begonia diamantina hort. ex Lesc.
* Begonia diaphones L.B. Sm. & Wassh.
* Begonia dicaricata Irmsch.
* Begonia dichotoma Jacq.
* Begonia dichroa Sprague
* Begonia dielseiana Gilg
* Begonia dielsiana E. Pritz.
* Begonia dietrichiana Irmsch.
* Begonia difformis F.A. Barkley ex Golding
* Begonia diffusa L.B. Sm. & B.G. Schub.
* Begonia diffusiflora Merr. & Perry
* Begonia digitata Raddi
* Begonia digwilliana Carrière
* Begonia digyna Irmsch.
* Begonia dimidiata Vell.
* Begonia dioica Buch.-Ham. ex D. Don
* Begonia dipetala Graham
* Begonia diptera Dryand.
* Begonia discolor R. Br.
* Begonia discrepans Irmsch.
* Begonia discreta Craib
* Begonia dispar Rchb.
* Begonia dissecta Irmsch.
* Begonia disticha Link
* Begonia divaricata Irmsch.
* Begonia diversifolia Graham
* Begonia diversistipulata Irmsch.
* Begonia diwolii Kiew
* Begonia djamuensis Irmsch.
* Begonia dodsonii L.B. Sm. & Wassh.
* Begonia dolabrifera C. DC.
* Begonia dolichotricha Merr.
* Begonia domingensis A. DC.
* Begonia dominicalis A. DC.
* Begonia donkelaariana Lem.
* Begonia dosedlae Gilli
* Begonia dregei Burtt Davy
* Begonia dressleri Burt-Utley
* Begonia dryadis Irmsch.
* Begonia dubia Haw.
* Begonia duclouxii Gagnep.
* Begonia dugandiana L.B. Sm. & B.G. Schub.
* Begonia duncan-thomasii Sosef
* Begonia duruensis De Wild.
* Begonia dusenii Brade
* Begonia dux C.B. Clarke
* Begonia ealensis Irmsch.
* Begonia eberhardtii Gagnep.
* Begonia ebolowensis Engl.
* Begonia echinata Royle
* Begonia echinosepala Regel
* Begonia eciliata O.E. Schulz
* Begonia ecuador hort. ex E. K. Gray
* Begonia ecuadoriensis hort. ex Buxton
* Begonia edanoi Merr.
* Begonia edmundoi Brade
* Begonia edulis Gilg ex Engl.
* Begonia egleri Brade
* Begonia egregia N.E. Br.
* Begonia eiromischa Ridl.
* Begonia ekmanii Houghton ex L.B. Sm. & B.G. Schub.
* Begonia elachista Moonlight & Tebbitt
* Begonia elaeagnifolia Hook. f.
* Begonia elastotemmoides Hook. f.
* Begonia elata Klotzsch
* Begonia elatior hort. ex Steud.
* Begonia elatostematoides Merr.
* Begonia elatostemma Ridl.
* Begonia elatostemmoides Hook. f.
* Begonia elegans Elmer
* Begonia elianii Warb. ex T. Durand & Jacks.
* Begonia eliasii Warb.
* Begonia eliassii Warb.
* Begonia elisabethae Kiew
* Begonia elliotii Gilg ex Engl.
* Begonia elliptica Kunth
* Begonia elmeri Merr.
* Begonia elongata Wall.
* Begonia emeiensis C.M. Hu ex G.Y. Wu & T.C. Ku
* Begonia eminii R. Fern.
* Begonia emirnea Humbert ex Keraudren & Bosser
* Begonia engleri Gilg
* Begonia engleriana Gilg
* Begonia epibaterium Mart. ex A. DC.
* Begonia epilobioides Warb.
* Begonia epiphytica Hook. f.
* Begonia epipsila Brade
* Begonia episcopalis C.B. Clarke
* Begonia erecta Vell.
* Begonia erectocaulis Sosef
* Begonia erectotricha Sosef
* Begonia eriocaulis Vis.
* Begonia eriocaulon Neumann
* Begonia ermanii Klotzsch
* Begonia erminea L'Hér.
* Begonia erosa Blume
* Begonia erubescens H. Lév.
* Begonia erythrocarpa A. DC.
* Begonia erythrogyna Sands
* Begonia erythrotricha C. DC.
* Begonia esculenta Merr.
* Begonia espiritosantensis E.L. Jacques & Mamede
* Begonia esquirolii H. Lév.
* Begonia estrellensis C. DC.
* Begonia euryphylla L.B. Sm. ex S.F. Sm. & Wassh.
* Begonia eutricha Sands
* Begonia evansiana Andrews
* Begonia everettii Merr.
* Begonia exalata C. DC.
* Begonia excelsa Hook. f.
* Begonia exigua Irmsch.
* Begonia exilis O.E. Schulz
* Begonia extensa L.B. Sm. & B.G. Schub.
* Begonia extranea L.B. Sm. & B.G. Schub.
* Begonia fabulosa L.B. Sm. & Wassh.
* Begonia fagifolia Otto & A. Dietr.
* Begonia fagopyroides Kunth & Bouché
* Begonia falcata L.B. Sm. & B.G. Schub.
* Begonia falciloba Liebm.
* Begonia fallax DC.
* Begonia fangii Y.M. Shui & C.I Peng
* Begonia fasciculata Jack
* Begonia fasciculiflora Merr.
* Begonia faureana Linden ex Garnier
* Begonia faustinoi Burt-Utley & Utley
* Begonia favargeri Rech.
* Begonia fellereriana Irmsch.
* Begonia fenchihuensis S.S. Ying
* Begonia fengii T.C. Ku
* Begonia fenicis Merr.
* Begonia fernaldiana L.B. Sm. & B.G. Schub.
* Begonia fernando-costae Irmsch.
* Begonia ferramica N. Hallé
* Begonia ferruginea L. f.
* Begonia ferruginia H. Hara
* Begonia festiva Craib
* Begonia fibrosa C.B. Clarke
* Begonia ficicola Irmsch.
* Begonia fiebrigii C. DC.
* Begonia filibracteosa Irmsch.
* Begonia filicifolia N. Hallé
* Begonia filiformis Irmsch.
* Begonia filipes Benth.
* Begonia fimbriata Liebm.
* Begonia fimbribracteata Y.M. Shui & W.H. Chen
* Begonia fimbristipula Hance
* Begonia finlaysoniana Wall.
* Begonia fischeri Schrank
* Begonia fissicarpa Warb.
* Begonia fissisepala C. DC.
* Begonia fissistyla Irmsch.
* Begonia fissurarum C. DC.
* Begonia flacca Irmsch.
* Begonia flaccidissima Kurz
* Begonia flagellaris H. Hara
* Begonia flava Binns
* Begonia flavescens hort. ex Otto
* Begonia flaviflora H. Hara
* Begonia flexicaulis Ridl.
* Begonia flexula Ridl.
* Begonia flexuosa A. DC.
* Begonia floccifera Bedd.
* Begonia floribunda Carrière
* Begonia fluminensis Brade
* Begonia foliosa Kunth
* Begonia fonsecae Standl.
* Begonia forbesii King
* Begonia fordii Irmsch.
* Begonia forgetiana Hemsl.
* Begonia formosana (Hayata) Masam.
* Begonia formosissima Sandwith
* Begonia forrestii Irmsch.
* Begonia fortunensis Burt-Utley & Utley
* Begonia foveolata Irmsch.
* Begonia foxworthyi Burkill ex Ridl.
* Begonia fragae L. Kollmann & Peixoto
* Begonia fragilis Baker
* Begonia francisiae Ziesenh.
* Begonia francoisii Guillaumin
* Begonia franconis Liebm.
* Begonia fraseri Kiew
* Begonia friburgensis Brade
* Begonia frigida hort. ex A. DC.
* Begonia frigopyroides Kunth & C.D. Bouché
* Begonia fritz-muelleri Brade
* Begonia froebelii A. DC.
* Begonia fruticella Ridl.
* Begonia fruticosa A. DC.
* Begonia fuchsiiflora (A. DC.) A.I. Baranov & F.A. Barkley
* Begonia fuchsiifolia (A. DC.) Warb.
* Begonia fuchsioides Hook.
* Begonia fulgens Lem.
* Begonia fulvo-setulosa Brade
* Begonia fulvo-villosa Warb.
* Begonia furfuracea Hook. f.
* Begonia fusca Liebm.
* Begonia fuscisetosa Sands
* Begonia fuscocaulis Brade
* Begonia fusialata Warb.
* Begonia fusibulba C. DC.
* Begonia fusicarpa Irmsch.
* Begonia gabonensis J.J. de Wilde
* Begonia gagnepainiana Irmsch.
* Begonia galeottiana Lem.
* Begonia galeottii hort. Berol ex Klotzsch
* Begonia gamblei F.A. Barkley & Golding
* Begonia gamolepis L.B. Sm. & B.G. Schub.
* Begonia garagarana C. DC.
* Begonia gardneri A. DC.
* Begonia garretii Craib
* Begonia garrettii Craib
* Begonia garuvae L.B. Sm. & R.C. Sm.
* Begonia gaudichaudii A. DC.
* Begonia gehrigeri L.B. Sm.
* Begonia gehrtii Irmsch.
* Begonia gemella Warb. ex Koord.
* Begonia geminiflora L.B. Sm. & Wassh.
* Begonia gemmipara Hook. f. & Thomson
* Begonia gemmirhiza Lév.
* Begonia geniculata Jack
* Begonia gentilii De Wild.
* Begonia gentryi Burt-Utley & Utley
* Begonia geoffrayi Gagnep.
* Begonia geraniifolia Hook.
* Begonia geranioides Hook. f.
* Begonia germaineana Tebbitt
* Begonia gesnerioides L.B. Sm. & B.G. Schub.
* Begonia gibbsiae Irmsch. ex Sands
* Begonia gigabracteata H.Z. Li & H. Ma
* Begonia gigantea Wall.
* Begonia gigaphylla Y.M. Shui & W.H. Chen
* Begonia gilgiana Irmsch.
* Begonia gilgii Engl.
* Begonia gitingensis Elmer
* Begonia glaberrima Urb. & Ekman
* Begonia glabra Aubl.
* Begonia glabricaulis Irmsch.
* Begonia gladiifolia Engl.
* Begonia glandulifera Griseb.
* Begonia glandulosa A. DC. ex Hook.
* Begonia glauca (Klotzsch) Ruiz & Pav. ex A. DC.
* Begonia glaucoides Irmsch.
* Begonia glaucophylla Hook. f.
* Begonia glechomifolia C.M. Hu ex C.Y. Wu & T.C. Ku
* Begonia glutinosa Kiew
* Begonia goegoensis N.E. Br.
* Begonia goldingiana L. Kollmann & A.P. Fontana
* Begonia gomantongensis Kiew
* Begonia goniotis C.B. Clarke
* Begonia gorgonea Tebbitt
* Begonia gossweileri Irmsch.
* Begonia goudotii A. DC.
* Begonia gouroana A. Chev.
* Begonia gracilicaulis Irmsch.
* Begonia gracilioides Burt-Utley & Utley
* Begonia gracilior Burt-Utley & McVaugh
* Begonia gracilipes Merr.
* Begonia gracilipetiolata De Wild.
* Begonia gracilis Kunth
* Begonia gracillima A. DC.
* Begonia grahamiana Wight
* Begonia grandibracteolata Irmsch.
* Begonia grandiflora Jacq.
* Begonia grandis Dryand.
* Begonia grandpetala Irmsch.
* Begonia grantiana Craib
* Begonia grata Geddes ex Craib
* Begonia grewiifolia (A. DC.) Warb.
* Begonia griffithiana (C. DC.) Warb.
* Begonia griffithii Hook.
* Begonia grisea A. DC.
* Begonia griseocaulis Irmsch.
* Begonia groenewegensis hort. ex K. Koch & Fintelm.
* Begonia guaduensis Kunth
* Begonia guangxiensis C.Y. Wu
* Begonia guaniana H. Ma & H.Z. Li
* Begonia guantosii F.A. Barkley & Golding
* Begonia guatemalensis Van Houtte ex Galeotti
* Begonia gueinziana Irmsch.
* Begonia gueritziana Gibbs
* Begonia guianensis A. DC.
* Begonia guishanensis S.H. Huang & Y.M. Shui
* Begonia gulinqingensis S.H. Huang & Y.M. Shui
* Begonia gungshanensis C.Y. Wu
* Begonia gunnerifolia Linden & André
* Begonia guttata Wall. ex A. DC.
* Begonia guyanensis A. DC.
* Begonia haageana S. Watson
* Begonia haematotricha A. DC.
* Begonia hahiepiana H.Q. Nguyen & Tebbitt
* Begonia hainanensis Chun & F. Chun
* Begonia halconensis Merr.
* Begonia hamiltoniana Lehm.
* Begonia hammoniae Irmsch.
* Begonia handelii Irmsch.
* Begonia handroi Brade
* Begonia haniffii Burkhill
* Begonia harlingii L.B. Sm. & Wassh.
* Begonia harmandii Gagnep.
* Begonia harrowiana Diels
* Begonia hasskarliana A. DC.
* Begonia hasskarlii Zoll. & Moritzi
* Begonia hassleri C. DC.
* Begonia hastata Vell.
* Begonia hatacoa Buch.-Ham. ex D. Don
* Begonia haullevilleana De Wild.
* Begonia havilandii Ridl.
* Begonia hayamiana Nob.Tanaka
* Begonia hayatae Gagnep.
* Begonia heddei Warb.
* Begonia hederacea A. DC.
* Begonia hederifolia Linden ex A. DC.
* Begonia heineri Brade
* Begonia hekouensis S.H. Huang
* Begonia heliostrophe Kiew
* Begonia heloisana Brade
* Begonia hemicardia Elmer ex Merr.
* Begonia hemsleyana Hook. f.
* Begonia henrilaportei Scherber. & J. Duruisseau
* Begonia henriquesii C. DC.
* Begonia henryi Hemsl.
* Begonia henryi × sinensis? Irmsch.
* Begonia hepatica-maculata hort. ex Ziesenh.
* Begonia heptaptera Sands
* Begonia heracleifolia Schltdl. & Cham.
* Begonia herbacea Vell.
* Begonia heringeri Brade
* Begonia hernandiifolia Hook.
* Begonia hernandioides Merr.
* Begonia herrerae L.B. Sm. & B.G. Schub.
* Begonia herteri Irmsch.
* Begonia herticifolia hort. ex Klotzsch
* Begonia herveyana King
* Begonia hetacoa H. Hara
* Begonia heterochroma Sosef
* Begonia heteroclinis Miq. ex Koord.
* Begonia heterodonta Rusby
* Begonia heterophylla hort. ex Klotzsch
* Begonia heteropoda Baker
* Begonia hexandra Irmsch.
* Begonia hexaptera Sands
* Begonia heydei C. DC.
* Begonia hidalgensis Smith & Schubert
* Begonia hieronymi Lindau
* Begonia hilariana A. DC.
* Begonia hintoniana L.B. Sm. & B.G. Schub.
* Begonia hirsuta Aubl.
* Begonia hirsuticaulis Irmsch.
* Begonia hirsutula Hook. f.
* Begonia hirta (Klotzsch) L.B. Sm. & B.G. Schub.
* Begonia hirtella Link
* Begonia hispida Schott
* Begonia hispidavillosa Ziesenh.
* Begonia hispidissima Zippal ex Koorders
* Begonia hitchcockii Irmsch.
* Begonia hochbaumii hort. ex E. Otto
* Begonia hoegeana Regel & Schmidt
* Begonia hoehneana Irmsch.
* Begonia holmnielseniana L.B. Sm. & Wassh.
* Begonia holosericea Teijsm. & Binn.
* Begonia holostyla F.A. Barkley & Golding
* Begonia holtonis A. DC.
* Begonia holttumii Irmsch.
* Begonia homblei De Wild.
* Begonia homonyma Steud.
* Begonia hondurensis Burt-Utley & Utley
* Begonia hongkongensis F.W. Xing
* Begonia hookeri Sweet
* Begonia hookeriana Gardner
* Begonia horsfieldii Miq.
* Begonia horticola Irmsch.
* Begonia houttuynioides T.T. Yu
* Begonia howii Merr. & Chun
* Begonia huangii Y.M. Shui & W.H. Chen
* Begonia huberi C. DC.
* Begonia hubertii Ziesenh.
* Begonia huegelii (Klotzsch) A. DC.
* Begonia hugelii (Klotzsch) A. DC.
* Begonia hullettii Ridl.
* Begonia humbertii Keraudren
* Begonia humboldtiana Gibbs
* Begonia humericola Sands
* Begonia humilicaulis Irmsch.
* Begonia humilis Dryand.
* Begonia humillima L.B. Sm. & Wassh.
* Begonia hydrocotylifolia Otto ex Hook.
* Begonia hydrophila Miq.
* Begonia hydrophylloides L.B. Sm. & B.G. Schub.
* Begonia hydrrocotylifolia Graham ex Klotzsch
* Begonia hygrophila C. DC.
* Begonia hymenocarpa C.Y. Wu
* Begonia hymenophylla Gagnep.
* Begonia hymenophylloides Kingdon-Ward
* Begonia hypogaea H.J.P. Winkl.
* Begonia hypoggaea W. Winkl.
* Begonia hypolipara Sandwith
* Begonia ibitiocensis E.L. Jacques & Mamede
* Begonia ignea (Klotzsch) Warsz. ex A. DC.
* Begonia ignorata Irmsch.
* Begonia imbricata Sands
* Begonia imitans Irmsch.
* Begonia imperfecta Irmsch.
* Begonia imperialis Lem.
* Begonia inanis Irmsch.
* Begonia incana Lindl.
* Begonia incarnata Link & Otto
* Begonia incerta Craib
* Begonia incisa A. DC.
* Begonia incisoserrata A. DC.
* Begonia incondita Craib
* Begonia inconspicua Brade
* Begonia inculta Irmsch.
* Begonia inermis Irmsch.
* Begonia inflata C.B. Clarke
* Begonia injoloensis De Wild.
* Begonia inostegia Stapf
* Begonia insignis Graham
* Begonia insularis Brade
* Begonia insularum Irmsch.
* Begonia integerrima Spreng.
* Begonia integrifolia Dalzell
* Begonia intercedens Irmsch.
* Begonia intermixta Irmsch.
* Begonia inversa Irmsch.
* Begonia involucrata Liebm.
* Begonia ionophylla Irmsch.
* Begonia irdescens Dunn
* Begonia iridescens Dunn
* Begonia irmscheri L.B. Sm. & B.G. Schub.
* Begonia isabelensis Quisumb. & Merr.
* Begonia isalensis Humbert ex Keraudren & Bosser
* Begonia isoptera Dryand. ex Sm.
* Begonia isopterocarpa Irmsch.
* Begonia isopteroidea King
* Begonia itaguassuensis Brade
* Begonia itajaiensis Brade
* Begonia itatiaiensis Brade
* Begonia itatinensis Irmsch. ex Brade
* Begonia itercedens Irmsch.
* Begonia itupavensis Brade
* Begonia iucunda Irmsch.
* Begonia jagorii Warb.
* Begonia jairii Brade
* Begonia jaliscana Burt-Utley
* Begonia jamaicensis A. DC.
* Begonia jamesoniana A. DC.
* Begonia jarmilae Halda
* Begonia jatrophifolia F. Cels
* Begonia jaurezii Laing
* Begonia jayaensis Kiew
* Begonia jenmanii Tutin
* Begonia jiewhoei Kiew
* Begonia jingxiensis D. Fang & Y.G. Wei
* Begonia jocelinoi Brade
* Begonia johnstonii Oliv. ex Hook. f.
* Begonia josephi A. DC.
* Begonia juliana Loefgr. ex Hoehne
* Begonia junghuhniana Miq.
* Begonia juninensis Irmsch.
* Begonia juntasensis Kuntze
* Begonia jureiensis S. Gomes da Silva & Mamede
* Begonia jussiaecarpa Warb.
* Begonia kachak K.G.Pearce
* Begonia kaietukensis Tutin
* Begonia kalabenonensis Humbert ex Keraudren
* Begonia kalbreyeri (Oliv.) L.B. Sm. & B.G. Schub.
* Begonia kaniensis Irmsch.
* Begonia karperi J.C. Arends
* Begonia karwinskyana A. DC.
* Begonia kasutensis K.G.Pearce
* Begonia kautskyana Handro
* Begonia keeana Kiew
* Begonia keithii Kiew
* Begonia kellermanii C. DC.
* Begonia kelliana Irmsch.
* Begonia keniensis Gilg ex Engl.
* Begonia kennedyi F.A. Barkley & Golding
* Begonia kenworthyae Ziesenh.
* Begonia keraudremae Pinner & al
* Begonia keraudrenae Bosser
* Begonia kerrii Craib
* Begonia kerstingii Irmsch.
* Begonia khasiana C.B. Clarke
* Begonia kiamfeei Kiew & S.Julia
* Begonia killipiana L.B. Sm. & B.G. Schub.
* Begonia kimusiana C. Chev.
* Begonia kinabaluensis Sands
* Begonia kingdon-wardii Tebbitt
* Begonia kingiana Irmsch.
* Begonia kisuluana Büttner
* Begonia klainei Pierre ex Pellegr.
* Begonia klemmei Merr.
* Begonia klossii Ridl.
* Begonia knoopii Ziesenh.
* Begonia koksunii Kiew
* Begonia komoensis Irmsch.
* Begonia konder-reisiana L.B. Sm. & R.C. Sm.
* Begonia koordersii Warb. ex Koord.
* Begonia kortsiae Ziesenh.
* Begonia kotoensis Hayata
* Begonia kouytcheouensis Guill.
* Begonia kraussiantha Irmsch.
* Begonia kribensis Engl.
* Begonia krystofii Halda
* Begonia kuhlmannii Brade
* Begonia kui C.I Peng
* Begonia kummerae Gilg
* Begonia kunstleriana King
* Begonia kunthiana Walp.
* Begonia labiensis Sands
* Begonia labomaculata C. DC.
* Begonia labordei H. Lév.
* Begonia laccophora Sands
* Begonia lacera Merr.
* Begonia lacerata Irmsch.
* Begonia lachaoensis Ziesenh.
* Begonia laciniata Roxb.
* Begonia laciniosa A. DC.
* Begonia lacunosa Warb.
* Begonia lacustris Irmsch. ex Peekel
* Begonia laetvirides Gilg ex E. Carrell
* Begonia laevis Ridl.
* Begonia lagunensis Elmer
* Begonia lailana Kiew & Geri
* Begonia lambii Kiew
* Begonia laminariae Irmsch.
* Begonia lanata Linden & Rodigas
* Begonia lancangensis S.H. Huang
* Begonia lanceolata Vell.
* Begonia lancifolia Merr.
* Begonia lancilimba Merr.
* Begonia langbianensis Baker f.
* Begonia langsdorffii A. DC.
* Begonia lansbergeae Linden & Rodigas
* Begonia lanstyakii Brade
* Begonia lantanaefolia A. DC.
* Begonia lanternaria Irmsch.
* Begonia lanuginosa A. DC.
* Begonia lapistipula Engl.
* Begonia laporteifolia Warb.
* Begonia larorum L.B. Sm. & Wassh.
* Begonia lateralis Elmer ex Merr.
* Begonia latipetiolata Irmsch.
* Begonia latistipula Merr.
* Begonia laurina hort. ex A. DC.
* Begonia lauterbachii Warb.
* Begonia laxa L.B. Sm. & B.G. Schub.
* Begonia layang-layang Kiew
* Begonia lazat Kiew & Reza
* Begonia lazuli Linden
* Begonia lealii Brade
* Begonia leandrii Humbert ex Keraudren & Bosser
* Begonia leathermaniae O'Reilly & Kareg.
* Begonia lebrunii Robyns & Lawalrée
* Begonia lecomtei Gagnep.
* Begonia ledermannii Irmsch.
* Begonia lehmannii (Irmsch.) L.B. Sm. & B.G. Schub.
* Begonia lehmbachii Warb.
* Begonia leichtiana Irmsch. ex Sosef
* Begonia leivae J. Sierra
* Begonia lemaoutii #hort. ex Vallerand
* Begonia lemurica Keraudren
* Begonia lengguanii Kiew
* Begonia leopoldinensis L. Kollmann
* Begonia lepida Blume
* Begonia lepidella Ridl.
* Begonia lepidota Liebm.
* Begonia leprosa Hance
* Begonia leptantha C.B. Rob.
* Begonia leptophylla Taub.
* Begonia leptopoda C. DC.
* Begonia leptoptera Hara
* Begonia leptostyla Irmsch.
* Begonia leptotricha C. DC.
* Begonia letestui J.J. de Wilde
* Begonia lethomasiae R. Wilczek
* Begonia letouzeyi Sosef
* Begonia leucantha Ridl.
* Begonia leucochlora Sands
* Begonia leuconeura Urb. & Ekman
* Begonia leucosticta Warb.
* Begonia leucostricta Warb.
* Begonia leucotricha Sandst.
* Begonia leytensis Elmer
* Begonia libanensis Urb.
* Begonia libera (L.B. Sm. & B.G. Schub.) L.B. Sm. & B.G. Schub.
* Begonia libonica hort. ex Klotzsch
* Begonia lichenoides L.B. Sm. & B.G. Schub.
* Begonia liebmannii A. DC.
* Begonia liesneri Burt-Utley & Utley
* Begonia lignescens C.V. Morton
* Begonia lignosa Rusby
* Begonia liminghi hort.
* Begonia limminghei Pynaert
* Begonia limminghuana Morren
* Begonia limprichtii Irmsch.
* Begonia lindeniana A. DC.
* Begonia lindleyana Walp.
* Begonia lindmanii Brade
* Begonia linearifolia J. Sierra
* Begonia lineata N.E. Br.
* Begonia lineolata Brade
* Begonia lipingensis Irmsch.
* Begonia lipolepis L.B. Sm.
* Begonia listada L.B. Sm. & Wassh.
* Begonia lithophila C.Y. Wu
* Begonia littleri Merr.
* Begonia liuyanii C.I Peng, S.M. Ku & W.C. Leong
* Begonia lobata Schott ex Spreng.
* Begonia lobatopeltata Irmsch.
* Begonia lobbiana A. DC.
* Begonia lobbii A. DC.
* Begonia lobulata (Klotzsch) A. DC.
* Begonia locellata A. DC.
* Begonia locii C.I Peng, C.W. Lin & H.Q. Nguyen
* Begonia loheri Merr.
* Begonia lokobeensis Humbert ex Keraudren & Bosser
* Begonia loloensis Gilg
* Begonia lomensis Britton & P. Wilson
* Begonia longa C.I Peng & W.C. Leong
* Begonia longanensis C.Y. Wu
* Begonia longialata K.Y. Guan & D.K. Tian
* Begonia longibarbata Brade
* Begonia longibractea Merr.
* Begonia longicarpa K.Y. Guan & D.K. Tian
* Begonia longicaulis Ridl.
* Begonia longiciliata C.Y. Wu
* Begonia longifolia Blume
* Begonia longimaculata Irmsch.
* Begonia longinoda Merr.
* Begonia longipedunculata Golding & Kareg.
* Begonia longipes Hook.
* Begonia longipetiolata Baker f.
* Begonia longipila Lem.
* Begonia longirostris Benth.
* Begonia longiscapa Warb.
* Begonia longiseta Irmsch.
* Begonia longistipula Merr.
* Begonia longistyla Y.M. Shui & W.H. Chen
* Begonia longovillosa A. DC.
* Begonia lopensis M. Sosef & M. Leal
* Begonia lophoptera Rolfe
* Begonia loranthoides Hook. f.
* Begonia lossiae Kollmann
* Begonia louis-williamsii Burt-Utley
* Begonia lowiana King
* Begonia lubbersii E. Morren
* Begonia lucerna
* Begonia lucianae
* Begonia lucida Haw.
* Begonia lucidifolia Rojas
* Begonia lucidissima Golding & Kareg.
* Begonia lucifuga Irmsch.
* Begonia lucunda F.A. Barkley & Golding
* Begonia ludicra A. DC.
* Begonia ludwigii Irmsch.
* Begonia ludwigsii Gilg ex Wilczek
* Begonia lugonis L.B. Sm. & Wassh.
* Begonia lukuana Y.C. Liu & C.H. Ou
* Begonia lunaris E.L. Jacques
* Begonia lunatistyla Irmsch.
* Begonia luochengensis S.M. Ku, C.I Peng & Yan Liu
* Begonia lushaiensis C.E.C. Fisch.
* Begonia lutea L.B. Sm. & B.G. Schub.
* Begonia luxii C. DC.
* Begonia luxurians Scheidw.
* Begonia luzhaiensis T.C. Ku
* Begonia luzonensis Warb.
* Begonia lyallii A. DC.
* Begonia lyman-smithii Burt-Utley & Utley
* Begonia lynchiana Hook. f.
* Begonia lyniceorum Burt-Utley
* Begonia macahensis Glaz.
* Begonia macambrarensis Exell
* Begonia macbethii hort.
* Begonia macbrideana Irmsch.
* Begonia macdanielsii Standl.
* Begonia macdougallii Ziesenh.
* Begonia macduffieana L.B. Sm. & B.G. Schub.
* Begonia macgregorii Merr.
* Begonia machrisiana L.B. Sm. & B.G. Schub.
* Begonia macintyreana M. Hughes
* Begonia macra A. DC.
* Begonia macrideana F.A. Barkley & Golding
* Begonia macrocarpa Warb.
* Begonia macrophylla Lam.
* Begonia macropoda Gilg
* Begonia macroptera Klotzsch
* Begonia macrorhiza F.A. Barkley & Golding
* Begonia macrostyla Warb.
* Begonia macrotis Vis.
* Begonia macrotoma Irmsch.
* Begonia macrura Gilg
* Begonia maculata Raddi
* Begonia macura Gilg
* Begonia macvaughii Burt-Utley & Utley
* Begonia madaiensis Kiew
* Begonia madecassa Keraudren
* Begonia maestrensis Urb.
* Begonia magdalenae L.B. Sm. & B.G. Schub.
* Begonia magdalenensis Brade
* Begonia magnifica Linden
* Begonia maguanensis S.H. Huang & Y.M. Shui
* Begonia mairei H. Lév.
* Begonia majungaensis Guillaumin
* Begonia makrinii C.V. Morton ex Burt-Utley
* Begonia malabarica A. DC.
* Begonia malachosticta Sands
* Begonia malindangensis Merr.
* Begonia malipoensis S.H. Huang & Y.M. Shui
* Begonia malmquistiana Irmsch.
* Begonia malvacea Klotzsch
* Begonia mameiana C. DC.
* Begonia mamutensis Sands
* Begonia mananjebensis Humbert ex Keraudren
* Begonia mangorensis Humbert ex Keraudren
* Begonia manhaoensis S.H. Huang & Y.M. Shui
* Begonia manicata Brongn. ex F. Cels
* Begonia manillensis A. DC.
* Begonia mannii Hook.
* Begonia maracayuensis Parodi
* Begonia mariae L.B. Sm.
* Begonia mariannensis Wassh. & McClellan
* Begonia mariculata Cels
* Begonia marinae Tebbitt
* Begonia mariti Burt-Utley
* Begonia marmorata Van Houtte ex Planch.
* Begonia marnieri Keraudren
* Begonia marojejyensis Humbert
* Begonia martabanica A. DC.
* Begonia martiana Link & Otto
* Begonia martinezii Burt-Utley & Utley
* Begonia martini H. Lév.
* Begonia martinicensis A. DC.
* Begonia martynia hort.
* Begonia masarangensis Irmsch.
* Begonia mascariensis Bojer & Baker
* Begonia mashanica D. Fang & D.H. Qin
* Begonia masoalaensis M. Hughes
* Begonia masoniana Irmsch. ex Ziesenh.
* Begonia matogrossensis L.B. Sm. ex S.F. Sm. & Wassh.
* Begonia mattos-silvae L.B. Sm. ex S.F. Sm. & Wassh.
* Begonia matudae Burt-Utley & Utley
* Begonia maurandiae A. DC.
* Begonia mauricei Ziesenh.
* Begonia maxima hort. ex A. DC.
* Begonia maxwelliana King
* Begonia mayasiana L.B. Sm. & B.G. Schub.
* Begonia maynensis A. DC.
* Begonia mayombensis Irmsch.
* Begonia mazae Ziesenh.
* Begonia mbangaensis Sosef
* Begonia mcphersonii Burt-Utley & Utley
* Begonia mearnsii Merr.
* Begonia media Merr. & Perry
* Begonia medusae Linden
* Begonia megacarpa Merr.
* Begonia megalantha Merr.
* Begonia megalophyllaria C.Y. Wu
* Begonia megaphylla A. DC.
* Begonia megaptera A. DC.
* Begonia megapteroidea King
* Begonia meisneri Wall.
* Begonia mekonggensis D. Girmansyah & Wiriadinata
* Begonia melikopia Kiew
* Begonia membranacea A. DC.
* Begonia mendumae M. Hughes
* Begonia menglianensis Y.Y. Qian
* Begonia mengtzeana Irmsch.
* Begonia mengyangensis
* Begonia meridensis A. DC.
* Begonia merrillii Warb.
* Begonia merrittii Merr.
* Begonia mesneri Wall.
* Begonia metachroa Fotsch
* Begonia metallica W.G. Sm.
* Begonia mexera hort.
* Begonia mexiae Standl.
* Begonia mexicana P. Karst. ex Fotsch
* Begonia meyeniana Walp.
* Begonia meyeri Hook.
* Begonia meyeri-johannis Engl.
* Begonia meysseliana Linden
* Begonia meysselliana Linden
* Begonia michoacana L.B. Sm. & B.G. Schub.
* Begonia micranthera Griseb.
* Begonia microcarpa A. DC.
* Begonia microphylla A. DC.
* Begonia microptera Hook.
* Begonia micropteron A. DC.
* Begonia microsperma Warb.
* Begonia mildbraedii Gilg
* Begonia militaris L.B. Sm. & B.G. Schub.
* Begonia mindanaensis Warb.
* Begonia mindorensis Merr.
* Begonia miniata Planch. & Linden
* Begonia minicarpa H. Hara
* Begonia minima Bedd.
* Begonia minjemensis Irmsch.
* Begonia minor Jacq.
* Begonia minuta Sosef
* Begonia minutiflora Sands
* Begonia minutifolia N. Hallé
* Begonia miranda Irmsch.
* Begonia mmegaphylla A. DC.
* Begonia modesta Liebm.
* Begonia modestiflora Kurz
* Begonia modica Stapf
* Begonia molinae Burt-Utley
* Begonia molinana Burt-Utley
* Begonia molleri (A. DC.) Warb.
* Begonia mollicaulis Irmsch.
* Begonia mollis A. DC.
* Begonia monadelpha (Klotzsch) Ruiz & Pav. ex A. DC.
* Begonia monantha Warb.
* Begonia monicae Aymonin & Bosser
* Begonia monophylla Pav. ex A. DC.
* Begonia monoptera Link & Otto
* Begonia montana (A. DC.) Warb.
* Begonia monte-alenensis Sosef
* Begonia monterosae A. Chev.
* Begonia monticola C. DC.
* Begonia montis-bismarckii Warb.
* Begonia montis-elephantis J.J. de Wilde
* Begonia mooreana (Irmsch.) L.L. Forrest & Hollingsw.
* Begonia morelii Irmsch.
* Begonia morifolia T.T. Yu
* Begonia morii Burt-Utley
* Begonia moritziana Kunth & Bouché
* Begonia morsei Irmsch.
* Begonia moszkowskii Irmsch.
* Begonia motozintlensis Burt-Utley & Utley
* Begonia mouhotiana Hosseus
* Begonia moulmeinensis C.B. Clarke
* Begonia moysesii Brade
* Begonia mucronistipula C. DC.
* Begonia muliensis T.T. Yu
* Begonia multangula Blume
* Begonia multibulbillosa Mart. ex Steud.
* Begonia multidentata Warb.
* Begonia multiflora Benth.
* Begonia multinervia Liebm.
* Begonia multistaminea Burt-Utley
* Begonia muricata Blume
* Begonia murina Craib
* Begonia muroptera hort.
* Begonia murudensis Merr.
* Begonia mutabilis Harland
* Begonia myriantha Britton
* Begonia mystacina L.B. Sm. & Wassh.
* Begonia mysteriosa Kollmann & A.P. Fontana
* Begonia nana L'Hér.
* Begonia nantoensis M.J. Lai & N.J. Chung
* Begonia napoensis L.B. Sm. & Wassh.
* Begonia natalensis Hook.
* Begonia naumoniensis Irmsch.
* Begonia ndongensis Engl.
* Begonia neglecta A. DC.
* Begonia negrosensis Elmer
* Begonia nelumbonifolia Schltdl. & Cham.
* Begonia nemophila Kurz
* Begonia nemoralis L.B. Sm. & B.G. Schub.
* Begonia neococcinea Heede
* Begonia neocomensium A. DC.
* Begonia neoharlingii L.B. Sm. & Wassh.
* Begonia neoperrieri Humbert ex Keraudren
* Begonia neopurpurea L.B. Sm. & Wassh.
* Begonia nepalensis (A. DC.) Warb.
* Begonia nervidens Irmsch.
* Begonia nervipilosa F.A. Barkley & Golding
* Begonia nervosa Desf. ex Klotzsch
* Begonia nevadensis Dorr
* Begonia niahensis K.G.Pearce
* Begonia nicaraguensis Standl.
* Begonia nicolai-hallei R. Wilczek
* Begonia nigrescens Van Houtte ex Otto
* Begonia nigricans L.H. Bailey
* Begonia nigritarum (Kamel) Steud.
* Begonia nigrovenia Regel
* Begonia ningmingensis D. Fang, Y.G. Wei & C.I Peng
* Begonia nitida Dryand.
* Begonia nivea Parish ex Kurz
* Begonia nobilis hort.
* Begonia nomonyma hort.
* Begonia northiana hort. ex Gentil
* Begonia nossibea A. DC.
* Begonia nosymangabensis Scherber. & J. Duruisseau
* Begonia notata Craib
* Begonia notiophila Urb.
* Begonia novalombardiensis L. Kollmann
* Begonia novogranatae A. DC.
* Begonia novoguineensis Merr. & L.M. Perry
* Begonia nubicola L.B. Sm. & B.G. Schub.
* Begonia nuda Irmsch.
* Begonia nummulariifolia Putz.
* Begonia nurii Irmsch.
* Begonia nyassensis Irmsch.
* Begonia nymphaeifolia T.T. Yu
* Begonia oaxacana A. DC.
* Begonia obdeltata Gregório & E.L. Jacques
* Begonia oblanceolata Rusby
* Begonia obliqua L.
* Begonia obliquifolia S.H. Huang & Y.M. Shui
* Begonia oblongata Merr.
* Begonia oblongifolia Stapf
* Begonia obovatistipula C. DC.
* Begonia obovoidea Craib
* Begonia obscura Brade
* Begonia obsolescens Irmsch.
* Begonia obtecticaulis Irmsch.
* Begonia obtusifolia Merr.
* Begonia obversa C.B. Clarke
* Begonia occhionii Brade
* Begonia octopetala L'Hér.
* Begonia odeteiantha Handro
* Begonia odorata Willd.
* Begonia odoratissima hort.
* Begonia oellgaardii L.B. Sm. & Wassh.
* Begonia ohlendorfiana Buxton
* Begonia olbia Kerch.
* Begonia olgantha Merr.
* Begonia oligandra Merr. & L.M. Perry
* Begonia oligocarpa A. DC. ex Koord.
* Begonia oligophylla Blume ex Miq.
* Begonia oliveri L.B. Sm. & B.G. Schub.
* Begonia olsoniae L.B. Sm. & B.G. Schub.
* Begonia ophiogyna L.B. Sm. & B.G. Schub.
* Begonia opuliflora Putz.
* Begonia opulifolia Loudon
* Begonia orbiculata Jack
* Begonia orchidiflora Griff.
* Begonia oregana hort. ex Klotzsch
* Begonia oreodoxa Chun & F. Chun ex G.Y. Wu & T.C. Ku
* Begonia oreophila (Kiew) Kiew
* Begonia organensis Brade
* Begonia ornithocarpa Standl.
* Begonia ornithophylla Irmsch.
* Begonia otophora Merr. & Perry
* Begonia otophylla L.B. Sm. & B.G. Schub.
* Begonia ottonis Walp.
* Begonia ovatifolia A. DC.
* Begonia oxyanthera Warb.
* Begonia oxyloba Welw. ex Hook. f.
* Begonia oxyphylla A. DC.
* Begonia oxysperma A. DC.
* Begonia oxyura Merr. & Perry
* Begonia pachypoda L. Kollmann & Peixoto
* Begonia pachyrhachis L.B. Sm. & Wassh.
* Begonia padangensis Irmsch.
* Begonia palawanensis Merr.
* Begonia paleacea Kurz
* Begonia paleata Schott ex A. DC.
* Begonia palillosa Reinw. ex Koord.
* Begonia palmaris A. DC.
* Begonia palmata D. Don
* Begonia palmatiloba Liebm.
* Begonia palmeri S. Watson
* Begonia palmifolia hort. ex Buxton
* Begonia paludicola C. DC.
* Begonia palustris Hartw. ex Benth.
* Begonia panamensis Burt-Utley & Utley
* Begonia panayensis Merr.
* Begonia paniculata Parodi
* Begonia pantherina Putz. ex Linden
* Begonia paoana Kiew & S.Julia
* Begonia papillaris F. Cels
* Begonia papillosa Graham
* Begonia papuana Warb.
* Begonia papyraptera Sands
* Begonia paraguayensis Parodi
* Begonia paranaensis Brade
* Begonia parcifolia C. DC.
* Begonia parilis Irmsch.
* Begonia parishii C.B. Clarke
* Begonia parmata Irmsch.
* Begonia parodiana L.B. Sm. & B.G. Schub.
* Begonia partita Irmsch.
* Begonia parva Merr.
* Begonia parviflora Poepp. & Endl.
* Begonia parvifolia Schott
* Begonia parvilimba Merr.
* Begonia parvipeltata A. DC.
* Begonia parvistipulata Irmsch.
* Begonia parvula H. Lév. & Vaniot
* Begonia parvuliflora A. DC.
* Begonia pastoensis A. DC.
* Begonia patens Griseb. ex A. DC.
* Begonia patula Haw.
* Begonia pauciflora Lindl.
* Begonia paucilobata C.Y. Wu
* Begonia paulensis A. DC.
* Begonia paupercula King
* Begonia pavoniana A. DC.
* Begonia pavonina Ridl.
* Begonia pearcei Hook.
* Begonia pectennervia L.B. Sm. & Wassh.
* Begonia pedata Liebm.
* Begonia pedatifida H. Lév.
* Begonia pediophylla Merr. & Perry
* Begonia pedunculosa Wall.
* Begonia peekelii Irmsch.
* Begonia peii C.Y. Wu
* Begonia pelargoniiflora J.J. de Wilde & J.C. Arends
* Begonia peltata Otto & A. Dietr.
* Begonia peltatifolia H.L. Li
* Begonia peltifolia Schott
* Begonia peltigera Irmsch.
* Begonia pendula O.E. Schulz
* Begonia pengii S.M. Ku & Yan Liu
* Begonia peninsulae Irmsch.
* Begonia pennellii L.B. Sm. & B.G. Schub.
* Begonia penrissenensis Kiew & S.Julia
* Begonia pensilis L.B. Sm. & Wassh.
* Begonia pentaphragmifolia Ridl.
* Begonia pentaphylla Walp.
* Begonia pentyaphragmifolia Ridl.
* Begonia peperomioides Hook. f.
* Begonia peponifolia Brongn. ex Cels
* Begonia per-dusenii Brade
* Begonia perakensis King
* Begonia peristegia Stapf
* Begonia pernambucensis Brade
* Begonia perpusilla A. DC.
* Begonia perrieri Bois
* Begonia perryae L.B. Sm. & Wassh.
* Begonia peruibensis Handro
* Begonia peruviana A. DC.
* Begonia petalodes Lindl.
* Begonia petasitifolia Brade
* Begonia petracaea A. Chev.
* Begonia petraea A. Chev.
* Begonia petrophila Gilg
* Begonia petropolitana Glaz.
* Begonia phamiana Kiew
* Begonia phantasma Tebbitt
* Begonia philippinensis A. DC.
* Begonia philodendroides Ziesenh.
* Begonia phoeniogramma Ridl.
* Begonia phrixophylla Blatt. & McCann
* Begonia phuthoensis H.Q. Nguyen
* Begonia phyllomaniaca Mart.
* Begonia physalifolia Liebm.
* Begonia physandra Merr. & Perry
* Begonia pickelii Irmsch.
* Begonia picta Sm.
* Begonia picturata Yan Liu, S.M. Ku & C.I Peng
* Begonia pierrei Gagnep.
* Begonia pigmaea hort. ex Heede
* Begonia pilderia A. DC.
* Begonia pilderifolia C. DC.
* Begonia pilgeriana Irmsch.
* Begonia pilifera (Klotzsch) A. DC.
* Begonia pilosa Jack
* Begonia pilosella Irmsch.
* Begonia pinamalayensis Merr.
* Begonia pinetorum A. DC.
* Begonia pingbienensis C.Y. Wu
* Begonia pinglinensis C.I Peng
* Begonia pinheironis L.B. Sm. ex S.F. Sm. & Wassh.
* Begonia pinnatifida Merr. & L.M. Perry
* Begonia piresiana Handro
* Begonia pittieri C. DC.
* Begonia piurensis L.B. Sm. & B.G. Schub.
* Begonia plagioneura Milne-Redh.
* Begonia plantaginea L.B. Sm. & B.G. Schub.
* Begonia platanifolia Schott
* Begonia platycarpa Y.M. Shui & W.H. Chen
* Begonia platyphylla Merr.
* Begonia platyptera Urb.
* Begonia plebeja Liebm.
* Begonia pleioclada Irmsch.
* Begonia pleiopetala A. DC.
* Begonia pligandra Merr. & Perry
* Begonia plumieri A. DC.
* Begonia pluvialis L.B. Sm. ex S.F. Sm. & Wassh.
* Begonia poculifera Hook. f.
* Begonia poecila K. Koch
* Begonia poeppigiana (Klotzsch) A. DC.
* Begonia poggei Warb.
* Begonia pohliana Klotzsch
* Begonia poikilantha Gilg ex Engl.
* Begonia poilanei Kiew
* Begonia polilloensis Tebbitt
* Begonia polyandra Irmsch.
* Begonia polyantha Cannell
* Begonia polygonata Liebm.
* Begonia polygonifolia A. DC.
* Begonia polygonoides Hook. f.
* Begonia polypetala A. DC.
* Begonia polytricha C.Y. Wu
* Begonia popenoei Standl.
* Begonia populifolia Kunth
* Begonia populnea A. DC.
* Begonia porteana Van Geert
* Begonia porteri H. Lév. & Vaniot
* Begonia porteriana Fisch., C.A. Mey. & Avé-Lall.
* Begonia portillana S. Watson
* Begonia portoricensis A. DC.
* Begonia postarii Kiew
* Begonia potamophila Gilg
* Begonia praeclara King
* Begonia praerupta Irmsch.
* Begonia praetermissa Kiew
* Begonia preseriana hort.
* Begonia presteriana auct.
* Begonia preussii Warb.
* Begonia prieurii A. DC.
* Begonia princeae Gilg
* Begonia princeps A. DC.
* Begonia principalis F.A. Barkley & Golding
* Begonia pringlei S. Watson
* Begonia prionophylla Irmsch.
* Begonia prismatocarpa Hook.
* Begonia procridifolia Wall.
* Begonia procumbens Vell.
* Begonia prolifera A. DC.
* Begonia proloxa Craib
* Begonia promethea Ridl.
* Begonia propinqua Ridl.
* Begonia prostrata Irmsch.
* Begonia pruinata (Klotzsch) A. DC.
* Begonia pruinosa hort.
* Begonia pryeriana Ridl.
* Begonia pseudimpatiens Gilg
* Begonia pseudisoptera Irmsch.
* Begonia pseudocymbalifera L.B. Sm. & Wassh.
* Begonia pseudodaxinensis S.M. Ku, Yan Liu & C.I Peng
* Begonia pseudodryadis C.Y. Wu
* Begonia pseudoglauca Irmsch.
* Begonia pseudoimpatiens Gilg
* Begonia pseudolateralis Warb.
* Begonia pseudoleprosa C.I Peng, Yan Liu & S.M. Ku
* Begonia pseudolubbersii Brade
* Begonia pseudopeltata Burt-Utley & Utley
* Begonia pseudovaleri Kuntze
* Begonia pseudoviola Gilg
* Begonia psilophylla Irmsch.
* Begonia pteridoides Scherber. & J. Duruisseau
* Begonia puberula Sosef
* Begonia pubescens Ridl.
* Begonia pubipedicella C. DC.
* Begonia pudica L.B. Sm. & B.G. Schub.
* Begonia pulchella Raddi
* Begonia pulchera (Ridl.) L.L. Forrest & Hollingsw.
* Begonia pulcherrima Sosef
* Begonia pulchra (Ridl.) L.L.Forrest & Hollingsw.
* Begonia pululahuana C. DC.
* Begonia pulvinata auct.
* Begonia pulvinifera C.I Peng & Yan Liu
* Begonia pumila Craib
* Begonia pumilio Irmsch.
* Begonia punbatuensis Kiew
* Begonia punchak Kiew & S.Julia
* Begonia punctata Link, Klotzsch & Otto
* Begonia purdieana A. DC.
* Begonia purpurea A. Chev.
* Begonia purpureofolia S.H. Huang & Y.M. Shui
* Begonia purpusii Houghton ex Ziesenh.
* Begonia pusilla A. DC.
* Begonia pustulata Liebm.
* Begonia putii Craib
* Begonia puttii Craib
* Begonia putzeysiana A. DC.
* Begonia putzeysii hort.
* Begonia pycnantha Urb. & Ekman
* Begonia pycnocaulis Irmsch.
* Begonia pygmaea Irmsch.
* Begonia pyrifolia Kunth ex Otto
* Begonia pyrrha Ridl.
* Begonia quadrialata Warb.
* Begonia quadrilocularis Brade
* Begonia quaternata L.B. Sm. & B.G. Schub.
* Begonia quercifolia A. DC.
* Begonia quetamensis L.B. Sm. & B.G. Schub.
* Begonia quintasii A. DC.
* Begonia rabilii Craib
* Begonia racemiflora Ortigies ex C. Chev.
* Begonia racemigera R. Wilczek
* Begonia racemosa Jack
* Begonia rachmatii Tebbitt
* Begonia radiata Graham
* Begonia radicans Vell.
* Begonia rafael-torresii Burt-Utley
* Begonia ragozinii Schwacke
* Begonia raimondii Irmsch.
* Begonia rajah Ridl.
* Begonia ramentacea Paxton
* Begonia ramicola Gilg ex De Wild.
* Begonia ramosa Sosef
* Begonia ramosii Merr.
* Begonia randaiensis Sasaki
* Begonia randiana Merr. & Perry
* Begonia raulinii Brade
* Begonia ravenii C.I Peng & Y.K. Chen
* Begonia raynaliorum R. Wilczek
* Begonia razafinjohanyi Aymonin & Bosser
* Begonia rechardsoniana Merr. & Perry
* Begonia reflexisquamosa C.Y. Wu
* Begonia reginula Kiew
* Begonia reitzii Brade
* Begonia relicta L.B. Sm. & B.G. Schub.
* Begonia renifolia Irmsch.
* Begonia reniformis Dryand.
* Begonia repanda Blume
* Begonia repens Lam.
* Begonia repenticaulis Irmsch.
* Begonia reptans Benth.
* Begonia resecta Miq. ex Koord.
* Begonia retakensis Sands
* Begonia reticulata Gardner
* Begonia retinervia D. Fang, D.H. Qin & C.I Peng
* Begonia retusa O.E. Schulz
* Begonia rex Putz.
* Begonia rheifolia Irmsch.
* Begonia rhipsaloides A. Chev.
* Begonia rhizocapa Fisch. ex A. DC.
* Begonia rhizocarpa (Klotzsch) Fisch. ex A. DC.
* Begonia rhizocaulis (Klotzsch) A. DC.
* Begonia rhodantha Ridl.
* Begonia rhodochlamys L.B. Sm. & B.G. Schub.
* Begonia rhodophylla C.Y. Wu
* Begonia rhoephila Ridl.
* Begonia rhombicarpa A. DC.
* Begonia rhopalocarpa Warb.
* Begonia rhyacophila Kiew
* Begonia rhynchocarpa Y.M. Shui & W.H. Chen
* Begonia richardsiana T. Moore
* Begonia richardsoniana Houllet
* Begonia rieckei Warb.
* Begonia riedelii A. DC.
* Begonia rigida (Klotzsch) Regel ex A. DC.
* Begonia rimarum Craib
* Begonia riparia Irmsch.
* Begonia ripicola C. DC.
* Begonia rizalensis Merr.
* Begonia robinsonii Ridl.
* Begonia robusta Blume
* Begonia robustior Standl. & L.O. Williams
* Begonia rockii Irmsch.
* Begonia rodwellii auct.
* Begonia roezlii Lynch
* Begonia romeensis De Wild.
* Begonia rongjiangensis T.C. Ku
* Begonia roraimensis Tutin
* Begonia rosacea Putz.
* Begonia rosea A. DC.
* Begonia roseibractea Ziesenh.
* Begonia rosiflora Hook. f.
* Begonia rossmanniae A. DC.
* Begonia rostrata Welw. ex Hook. f.
* Begonia rotata Liebm.
* Begonia rotunda Vell.
* Begonia rotundifolia Griseb.
* Begonia rotundilimba S.H. Huang & Y.M. Shui
* Begonia roxburghii (Miq.) A. DC.
* Begonia roylei K. Koch
* Begonia rubella Buch.-Ham. ex D. Don
* Begonia rubellina L.H. Bailey
* Begonia rubicunda hort. ex A. DC.
* Begonia rubida Ridl.
* Begonia rubiginosipes Irmsch.
* Begonia rubinea H.Z. Li
* Begonia ruboides C.M. Hu ex C.Y. Wu & T.C. Ku
* Begonia rubra Blume
* Begonia rubricaulis Hook.
* Begonia rubriflora L. Kollmann
* Begonia rubrifolia Merr.
* Begonia rubro-venia Hook.
* Begonia rubromarginata Gilg
* Begonia rubronervata De Wild.
* Begonia rubronervia hort. ex Klotzsch
* Begonia rubropilosa A. DC.
* Begonia rubropunctata S.H. Huang & Y.M. Shui
* Begonia rubrosetulosa A. DC.
* Begonia rubrotincta L.B. Sm. & B.G. Schub.
* Begonia rubrovenia Hook.
* Begonia rudatisii Irmsch.
* Begonia rufa Thunb.
* Begonia rufipila Merr.
* Begonia rufosericea Toledo
* Begonia rugosa hort. ex Klotzsch
* Begonia ruhlandiana Irmsch.
* Begonia rumphii Vuijck ex Koorders
* Begonia rumpiensis Kupicha
* Begonia rupestris Baxter
* Begonia rupicola Miq.
* Begonia rupium Irmsch.
* Begonia ruschii L. Kollmann
* Begonia russelliana L.B. Sm. ex S.F. Sm. & Wassh.
* Begonia rutilans (Klotzsch) Van Houtte ex A. DC.
* Begonia rwandensis J.C. Arends
* Begonia sabahensis Kiew & J.H. Tan
* Begonia sageaensis Wiriadinata
* Begonia salaziensis (Gaudich.) Warb.
* Begonia salesopolensis S. Gomes da Silva & Mamede
* Begonia salicifolia A. DC.
* Begonia salisburyana Irmsch.
* Begonia salomonensis Merr. & Perry
* Begonia salvadorensis Irmsch.
* Begonia samarensis Merr.
* Begonia sambiranensis Humbert ex Keraudren & Bosser
* Begonia samhaensis M. Hughes & A.G. Mill.
* Begonia sandalifolia C.B. Clarke
* Begonia sandersii hort. ex A. DC.
* Begonia sandtii Houghton ex Ziesenh.
* Begonia sanguinea Raddi
* Begonia sanjeensis R. Wilczek
* Begonia santae-martae Irmsch.
* Begonia santarosensis Kuntze
* Begonia santos-limae Brade
* Begonia sarasinorum Irmsch.
* Begonia sarawakensis Ridl.
* Begonia sarchophylla Liebm.
* Begonia sarcocarpa G.S. Ridl.
* Begonia sarmentacea hort. ex Brilmayer
* Begonia sarmentosa L.B. Sm. & Wassh.
* Begonia sartorii Liebm.
* Begonia sassandrensis A. Chev.
* Begonia satrapis C.B. Clarke & Hook. f.
* Begonia saxatilis Blume
* Begonia saxicola A. DC.
* Begonia saxifraga A. DC.
* Begonia saxifragifolia Craib
* Begonia saxitilis Reinw. ex Koord.
* Begonia scabrida A. DC.
* Begonia scabridoidea L.B. Sm. & Wassh.
* Begonia scapigera Hook. f.
* Begonia sceptrum hort. ex Rodigin
* Begonia schaeferi Engl.
* Begonia scharffiana Regel
* Begonia scharffii Hook. f.
* Begonia scheidweileri Koord.
* Begonia schenckii Irmsch.
* Begonia schimpffii Irmsch.
* Begonia schizolepis Liebm.
* Begonia schlechteri Gilg
* Begonia schliebenii Irmsch.
* Begonia schlumbergeriana Lem.
* Begonia schmidtiana Regel
* Begonia schmidtii Regel
* Begonia schottiana A. DC.
* Begonia schubertiana Irmsch.
* Begonia schultzei Engl.
* Begonia schulziana Urb. & Ekman
* Begonia sciadiophora L.B. Sm. & B.G. Schub.
* Begonia sciaphila Gilg ex Engl.
* Begonia scintillans Dunn
* Begonia scitifolia Irmsch.
* Begonia scortechinii King
* Begonia scottii Tebbitt
* Begonia scutata Wall. ex A. DC.
* Begonia scutellata Liebm.
* Begonia scutifolia Hook. f.
* Begonia scutulum Hook. f.
* Begonia secunda L.B. Sm. & Wassh.
* Begonia seemanniana A. DC.
* Begonia segregata L.B. Sm. & B.G. Schub.
* Begonia selloi Lodd. ex Steud.
* Begonia selloii Link & Otto
* Begonia sellovii hort. ex Hook.
* Begonia sellowi hort. ex A. DC.
* Begonia sellowii Klotzsch
* Begonia semidigitata Brade
* Begonia semiovata Liebm.
* Begonia semiparietalis Yan Liu, S.M. Ku & C.I Peng
* Begonia semperflorens Link & Otto
* Begonia serafinensis Brade
* Begonia serapatensis Kiew & S.Julia
* Begonia seretii De Wild.
* Begonia sericoneura Liebm.
* Begonia serotina A. DC.
* Begonia serpens Merr.
* Begonia serranegrae L.B. Sm. ex S.F. Sm. & Wassh.
* Begonia serraticauda Merr. & Perry
* Begonia serratifolia C. DC.
* Begonia serratipetala Irmsch.
* Begonia serrulatoala C. DC.
* Begonia sessilanthera Warb.
* Begonia sessilifolia Hook. f.
* Begonia setaria hort. ex Graham
* Begonia setifera A. DC.
* Begonia setifolia Irmsch.
* Begonia setosa Klotzsch
* Begonia setulosa Bertol.
* Begonia setulosopeltata C.Y. Wu
* Begonia seychellensis Hemsl.
* Begonia sharpeana F. Muell.
* Begonia shilendrae Rekha Morris & P.D. McMillan
* Begonia siamensis Gagnep.
* Begonia sibthorpioides Ridl.
* Begonia sibutensis Sands
* Begonia siccacaudata J. Door.
* Begonia sikkimensis A. DC.
* Begonia silhetensis (A. DC.) C.B. Clarke
* Begonia silletensis (A. DC.) C.B. Clarke
* Begonia silverstonii Jara
* Begonia simii Stapf
* Begonia similis Brade
* Begonia simonsii hort. ex Hérincq
* Begonia simulans Irmsch.
* Begonia sine nomen Wall.
* Begonia sinensis A. DC.
* Begonia sinobrevicaulis T.C. Ku
* Begonia sinofloribunda Dorr
* Begonia sinovietnamica C.Y. Wu
* Begonia sinuata E. Mey. ex Otto & A. Dietr.
* Begonia sizemoreae Kiew
* Begonia skutchii Burt-Utley & Utley
* Begonia sleumeri L.B. Sm. & B.G. Schub.
* Begonia smilacina A. DC.
* Begonia smithiae Geddes
* Begonia smithiana T.T. Yu
* Begonia snitcheri hort.
* Begonia socia Craib
* Begonia socotrana Hook. f.
* Begonia sodiroi C. DC.
* Begonia sogerensis Ridl.
* Begonia solananthera A. DC.
* Begonia soli-mutata L.B. Sm. & Wassh.
* Begonia solitudinis Brade
* Begonia soluta Craib
* Begonia somervillei Hemsl.
* Begonia sonderiana Irmsch.
* Begonia sootepensis Craib
* Begonia sordidissima Elmer
* Begonia soror Irmsch.
* Begonia sorsogonensis Elmer
* Begonia sosefiana J.J. de Wilde & Valk.
* Begonia sousae Burt-Utley
* Begonia spadiciflora L.B. Sm. & B.G. Schub.
* Begonia sparreana L.B. Sm. & Wassh.
* Begonia sparsipila Baker
* Begonia spathulata Hornem.
* Begonia spatulata Lodd.
* Begonia speciosa hort. ex A. DC.
* Begonia speluncae Ridl.
* Begonia sphenocarpa Irmsch.
* Begonia spilotophylla F. Muell.
* Begonia spinibarbis Irmsch.
* Begonia splendens hort. ex A. DC.
* Begonia splendida A. DC.
* Begonia spraguei C. Weber
* Begonia spruceana A. DC.
* Begonia squamipes Irmsch.
* Begonia squamosa C. DC.
* Begonia squamulosa Hook. f.
* Begonia squarrosa Liebm.
* Begonia staudtii Gilg
* Begonia stella Regel
* Begonia stellata Sosef
* Begonia stenocardia L.B. Sm. & B.G. Schub.
* Begonia stenogyna Sands
* Begonia stenolepis L.B. Sm. & R.C. Sm.
* Begonia stenophylla A. DC.
* Begonia stenoptera C. DC.
* Begonia stenotepala L.B. Sm. & B.G. Schub.
* Begonia stevei M. Hughes
* Begonia steyermarkii L.B. Sm. & B.G. Schub.
* Begonia stichochaete K.G.Pearce
* Begonia stictopoda (Miq.) A. DC.
* Begonia stigmosa Lindl.
* Begonia stilandra Merr. & Perry
* Begonia stipulacea Willd.
* Begonia stipularis Spreng.
* Begonia stolzii Irmsch.
* Begonia strachwitzii Warb. ex Irmsch.
* Begonia strictinervis Irmsch.
* Begonia strictipetiolaris Irmsch.
* Begonia strigillosa A. Dietr.
* Begonia strigosa (Warb.) L.L. Forrest & Hollingsw.
* Begonia strigulosa A. DC.
* Begonia suaveolens Desf. ex Ham.
* Begonia suaviola Jara
* Begonia subacida Irmsch.
* Begonia subacuto-alata De Wild.
* Begonia subalpestris A. Chev.
* Begonia subcaudata Rusby ex L.B. Sm. & B.G. Schub.
* Begonia subciliata A. DC.
* Begonia subcoriacea C.I Peng, Yan Liu & S.M. Ku
* Begonia subcostata Rusby
* Begonia subcucullata C. DC.
* Begonia subcutata De Wild.
* Begonia subcyclophylla Irmsch.
* Begonia subelliptica Merr. & L.M. Perry
* Begonia suberfoliata Parish
* Begonia subfalcata De Wild.
* Begonia subhowii S.H. Huang
* Begonia subhumilis A. DC.
* Begonia subisensis K.G.Pearce
* Begonia sublobata Jack
* Begonia sublongipes Y.M. Shui
* Begonia subnummularifolia Merr.
* Begonia suboblata D. Fang & D.H. Qin
* Begonia suborbiculata Merr.
* Begonia subovata Wall.
* Begonia subpeltata Wight
* Begonia subperfoliata Parish ex Kurz
* Begonia subpetala hort. ex Regel
* Begonia subprostrata Merr.
* Begonia subrectangula Rusby
* Begonia subrectangular Rusby
* Begonia subrotunda Wall.
* Begonia subscutata De Wild.
* Begonia subspinulosa Irmsch.
* Begonia subtilis Irmsch.
* Begonia subtruncata Merr.
* Begonia subvillosa Klotzsch
* Begonia subviridis Craib
* Begonia sucrensis L.B. Sm. & B.G. Schub.
* Begonia sudjanae C.-A. Jansson
* Begonia suffrutescens Merr. & Perry
* Begonia suffruticosa Meisn.
* Begonia sukutensis Burt-Utley & Utley
* Begonia sulcata Scheidw.
* Begonia summoglabra T.T. Yu
* Begonia sunorchis C. Chev.
* Begonia suprafastigiata Irmsch.
* Begonia surculigera Kurz
* Begonia susaniae Sosef
* Begonia suthelandii Binns
* Begonia sutherlandii Hook. f.
* Begonia sychnantha L.B. Sm. & Wassh.
* Begonia sylvatica A. DC.
* Begonia sylvestris A. DC.
* Begonia symbeccarii L.L. Forrest & Hollingsw.
* Begonia symbracteosa L.L. Forrest & Hollingsw.
* Begonia symgeraniifolia L.L. Forrest & Hollingsw.
* Begonia symhirta L.L. Forrest & Hollingsw.
* Begonia sympapuana L.L. Forrest & Hollingsw.
* Begonia symparvifolia L.L. Forrest & Hollingsw.
* Begonia sympodialis Irmsch.
* Begonia symsanguinea L.L. Forrest & Hollingsw.
* Begonia syphilitica Sessé & Moç.
* Begonia syphillitica Sessé & Moc.
* Begonia tacana Ziesenh.
* Begonia tafaensis Merr. & L.M. Perry
* Begonia tafiensis Lillo
* Begonia taiwaniana Hayata
* Begonia taliensis Gagnep.
* Begonia tambelanensis (Irmsch.) Kiew
* Begonia tampinica Burkill ex Irmsch.
* Begonia tanacetifolia Steud.
* Begonia tanala Humbert ex Keraudren & Bosser
* Begonia tandangii C.I Peng & Rubite
* Begonia tapatia Burt-Utley & McVaugh
* Begonia tarokoensis M.J. Lai
* Begonia tascellezii auct.
* Begonia tatoniana R. Wilczek
* Begonia tawaensis Merr.
* Begonia tayabensis Merr.
* Begonia tayloriae Standl. ex F.A. Barkley
* Begonia tayloriana Irmsch.
* Begonia telfariae Hook. ex Steud.
* Begonia temburongensis Sands
* Begonia tenella D. Don
* Begonia tenera Dryand.
* Begonia tenericaulis Ridl.
* Begonia tengchiana C.I Peng & Y.K. Chen
* Begonia tenuicaulis A. DC.
* Begonia tenuifolia Dryand.
* Begonia tenuipila C. DC.
* Begonia tenuis Burt-Utley & Utley
* Begonia tessaricarpa C.B. Clarke
* Begonia tetragona Irmsch.
* Begonia tetralobata Y.M. Shui
* Begonia tetrandra Irmsch.
* Begonia teuscheri Linden ex André
* Begonia teusziana #J. Braun & K. Schumacher
* Begonia teysmanniana (Miq.) Miq. ex B.D. Jacks.
* Begonia thaipingensis King
* Begonia thaspingensis King
* Begonia thelmae L.B. Sm. & Wassh.
* Begonia thermarum L.B. Sm. & B.G. Schub.
* Begonia thiemei C. DC.
* Begonia thomeana C. DC.
* Begonia thomsonii A. DC.
* Begonia thwaitesii Hook.
* Begonia thyrsoidea Irmsch.
* Begonia tigrina Kiew
* Begonia tiliifolia C. DC.
* Begonia timorensis (Miq.) Golding & Kareg.
* Begonia tinctoria L.B. Sm. & B.G. Schub.
* Begonia tiomanensis Ridl.
* Begonia tlapensis Burt-Utley & Utley
* Begonia togoensis Gilg
* Begonia toledana L.B. Sm. & B.G. Schub.
* Begonia toledoana Handro
* Begonia tomentosa Schott
* Begonia tominana Golding
* Begonia tonduzii C. DC.
* Begonia tonkinensis Gagnep.
* Begonia torresii Standl.
* Begonia torricellensis Warb.
* Begonia tovarensis Klotzsch
* Begonia trachyptera Benth.
* Begonia trapa L.B. Sm. & B.G. Schub.
* Begonia trianae (A. DC.) Warb.
* Begonia tribenensis A.R. Rao
* Begonia tribracteata Irmsch.
* Begonia trichocarpa Dalzell
* Begonia trichochila Warb.
* Begonia trichopoda Miq.
* Begonia trichosepala C. DC.
* Begonia tricornis Ridl.
* Begonia tricuspidata C.B. Clarke
* Begonia triflora Irmsch.
* Begonia trigonocarpa Ridl.
* Begonia trigonoptera Sprague
* Begonia triloba C. DC.
* Begonia triradiata C.B. Clarke
* Begonia triramosa Irmsch.
* Begonia trispathulata (A. DC.) Warb.
* Begonia trisulcata (A. DC.) Warb.
* Begonia tropaeolifolia A. DC.
* Begonia trujillensis L.B. Sm.
* Begonia trullifolia Guillaumin
* Begonia truncata Vell.
* Begonia truncatiloba Irmsch.
* Begonia truncicola Sodiro ex C. DC.
* Begonia tsaii Irmsch.
* Begonia tsaratananensis Aymonin & Bosser
* Begonia tsimihety Humbert ex Keraudren
* Begonia tsoongii C.Y. Wu
* Begonia tuberosa Heyne ex A. DC.
* Begonia tuerckheimii C. DC.
* Begonia tumaitesii hort.
* Begonia tumbezensis Irmsch.
* Begonia turbinata Ridl.
* Begonia turrialbae Burt-Utley & Utley
* Begonia udisilvestris C. DC.
* Begonia ulei C. DC.
* Begonia uliginosa Schott ex Klotzsch
* Begonia ulmifolia Bang ex Kuntze
* Begonia umbellata Kunth
* Begonia umbilicata Planch.
* Begonia umbraculifera Hook. f.
* Begonia umbraculifolia Y. Wan & B.N. Chang
* Begonia umbrata A. DC.
* Begonia uncinata hort. ex Klotzsch
* Begonia unduavensis Rusby
* Begonia undulata Otto ex Graham
* Begonia unialata C. DC.
* Begonia uniflora S. Watson
* Begonia unifolia Rose ex Trel.
* Begonia unilateralis Rusby
* Begonia urdanetensis Elmer
* Begonia urophylla Hook.
* Begonia ursina L.B. Sm. & B.G. Schub.
* Begonia urticae L. f.
* Begonia urticaefolia (Klotzsch) Warb.
* Begonia urticifolia (Klotzsch) Warb.
* Begonia uruapensis Sessé & Moc.
* Begonia urunensis Kiew
* Begonia uvana C. DC.
* Begonia vaccinioides Sands
* Begonia vagans Craib
* Begonia vaginans Vell.
* Begonia valdensium A. DC.
* Begonia valerii Standl.
* Begonia valida K.I. Goebel
* Begonia validissima hort.
* Begonia vallerea Klotzsch
* Begonia vallicola Kiew
* Begonia valvata L.B. Sm. & B.G. Schub.
* Begonia vanderckhovenii De Wild.
* Begonia vanderichoveni De Wild.
* Begonia vanderwateri Ridl.
* Begonia vandewateri Ridl.
* Begonia vankerckhovenii De Wild.
* Begonia vanoverberghii Merr.
* Begonia vanovrerberghii Merr.
* Begonia vareschii Irmsch.
* Begonia variabilis Ridl.
* Begonia varians A. DC.
* Begonia variegata Y.M. Shui & W.H. Chen
* Begonia variifolia Y.M. Shui & W.H. Chen
* Begonia varipeltata D.C.Thomas
* Begonia varistyla Irmsch.
* Begonia veitchii Hook. f.
* Begonia velata L.B. Sm. & B.G. Schub.
* Begonia vellerea Klotzsch
* Begonia velloziana Walp.
* Begonia vellozoana Brade
* Begonia velutina Brongn. ex Neumann
* Begonia venosa Skan ex Hook. f.
* Begonia venusta King
* Begonia verdickii De Wild.
* Begonia vernicosa hort. ex Klotzsch
* Begonia verruculosa L.B. Sm.
* Begonia versicolor Irmsch.
* Begonia verticillata Hook.
* Begonia vestita C. DC.
* Begonia vicina Irmsch.
* Begonia villifera Galeotti
* Begonia villifolia Irmsch.
* Begonia villigera Galeotti
* Begonia villipetiola C. DC.
* Begonia villosa Gardner
* Begonia vincentina O.E. Schulz
* Begonia violifolia A. DC.
* Begonia viridiflora A. DC.
* Begonia viscida Ziesenh.
* Begonia vitiensis A.C. Sm.
* Begonia vitifolia Schott
* Begonia vittariifolia N. Hallé
* Begonia vuijckii Koord.
* Begonia wadei Merr. & Quisumb.
* Begonia wageneria A. DC.
* Begonia wageneriana Hook.
* Begonia wagneriana Hook.
* Begonia wakefieldii Gilg ex Engl.
* Begonia wallichiana Steud. ex Lehm.
* Begonia walpersii Heynh.
* Begonia walteriana Irmsch.
* Begonia wangii T.T. Yu
* Begonia warburgiana Hieron.
* Begonia warburgii Gilg
* Begonia wariana Irmsch.
* Begonia warpuri Hemsl.
* Begonia warscewiczii Neuman
* Begonia warscewitzii Neumann
* Begonia washingtoniana hort. ex C. Chev.
* Begonia wasshauseniana L. Kollmann & Peixoto
* Begonia wattii C.B. Clarke
* Begonia watuwilensis D. Girmansyah
* Begonia weberbaueri Irmsch.
* Begonia weberi Merr.
* Begonia weberlingii Irmsch.
* Begonia weddelliana A. DC.
* Begonia weigallii Hemsl.
* Begonia wellmanii Gilg ex Engl.
* Begonia wellmannii Gilg ex Engl.
* Begonia wengeri C.E.C. Fisch.
* Begonia wenshanensis C.M. Hu ex C.Y. Wu & T.C. Ku
* Begonia wenzelii Merr.
* Begonia whytei Stapf
* Begonia wightiana Wall.
* Begonia wilburii Burt-Utley & Utley
* Begonia wilczekiana N. Hallé
* Begonia wilksii Sosef
* Begonia wilksii × williamsii B.S. Williams
* Begonia williamsii Rusby & Nash
* Begonia wilsonii Gagnep.
* Begonia windischii L.B. Sm. ex S.F. Sm. & Wassh.
* Begonia wollastonii Baker f.
* Begonia wollnyi Herzog
* Begonia woodii Merr.
* Begonia wrayi Hemsl.
* Begonia wrightiana A. DC.
* Begonia wurdackii L.B. Sm. & B.G. Schub.
* Begonia wutaiana C.I Peng & Y.K. Chen
* Begonia wyepingiana Kiew
* Begonia xanthina Hook.
* Begonia xerophyta L.B. Sm. & Wassh.
* Begonia xilitlensis Burt-Utley
* Begonia xingyiensis T.C. Ku
* Begonia xinyiensis T.C. Ku
* Begonia xiphophylla Irmsch.
* Begonia xishuiensis T.C. Ku
* Begonia xylopoda L.B. Sm. & B.G. Schub.
* Begonia yappii Ridl.
* Begonia yingjiangensis S.H. Huang
* Begonia yishanensis T.C. Ku
* Begonia ynesiae L.B. Sm. & Wassh.
* Begonia yui Irmsch.
* Begonia yunckeri Standl.
* Begonia yunnanensis H. Lév.
* Begonia zairensis Sosef
* Begonia zamboangensis Merr.
* Begonia zebrina Loudon
* Begonia zenkeri Irmsch.
* Begonia zenkeriana L.B. Sm. & Wassh.
* Begonia zeylanica Van Houtte
* Begonia zhangii D. Fang & D.H. Qin
* Begonia zhengyiana Y.M. Shui
* Begonia zimmermannii Peter ex Irmsch.
* Begonia zobiaensis De Winter
* Begonia zollingeriana A. DC.
* Begonia × adonis auct.
* Begonia × albopicta W. Bull
* Begonia × amabilis Linden
* Begonia × ameliae Bruant ex Duch.
* Begonia × antonietae Brade
* Begonia × argenteoguttata M. Lemoine
* Begonia × ascotiensis J.B. Weber
* Begonia × bertinii Legros
* Begonia × breviscapa C.I Peng, Yan Liu & S.M. Ku
* Begonia × buimontana Y. Yamam.
* Begonia × bunchii L.H. Bailey
* Begonia × carminata Dombrain
* Begonia × caulohybrida Voss
* Begonia × cheimantha Everett ex C.Weber
* Begonia × chelsonii T. Moore
* Begonia × chungii C.I Peng & S.M. Ku
* Begonia × clementiniae Bruant
* Begonia × coronata auct.
* Begonia × credneri F. Haage & E. Schmidt
* Begonia × crispa Krel.
* Begonia × digswelliana Dombrain
* Begonia × duchartrei Bruant ex André
* Begonia × erici-magni Lindq.
* Begonia × erythrophylla Hérincq
* Begonia × excelsior Linden
* Begonia × eximia Lem.
* Begonia × feastii L.H. Bailey
* Begonia × frigida A. DC.
* Begonia × fuscomaculata A.E. Lange
* Begonia × gilsonii Gilson
* Begonia × globosa Heinem.
* Begonia × heracleicotyle H.J. Veitch
* Begonia × hiemalis Fotsch
* Begonia × hortensis Grafl & Zwicky
* Begonia × hybrida auct.
* Begonia × incomparabilis Pennick
* Begonia × ingramii T. Moore & Ayres
* Begonia × intermedia Veitch ex Van Houtte
* Begonia × langeana Fotsch
* Begonia × lapeyrousei Van Houtte
* Begonia × leopoldii Lem.
* Begonia × lesoudsii André
* Begonia × lindquistii C.-A. Jansson
* Begonia × longicyma Bellair
* Begonia × margaritacea H.J. Veitch
* Begonia × margaritae Fotsch
* Begonia × marmorea Van Houtte ex Planch.
* Begonia × neubertii auct.
* Begonia × ottoniana (Regel) A. DC.
* Begonia × phyllomaniaca Mart.
* Begonia × pictavensis Bruant ex André
* Begonia × prestoniensis T. Moore ex Planch.
* Begonia × prometheus auct.
* Begonia × pseudophyllomaniaca A.E. Lange
* Begonia × reichenheimii G. Bartsch
* Begonia × rhizohybrida Voss
* Begonia × richardii C. Moore
* Begonia × ricinifolia A. Dietr.
* Begonia × rubellina L.H. Bailey
* Begonia × sagittata auct.
* Begonia × saundersii Voss
* Begonia × sedenii auct.
* Begonia × taipeiensis C.I Peng
* Begonia × tuberhybrida Voss
* Begonia × versaliensis Carrière
* Begonia × verschaffeltiana Lem.
* Begonia × verschaffeltii Regel
* Begonia × viaudii André
* Begonia × weltoniensis J.B. Weber
* Begonia × williamsii B.S. Williams
* Begonia × worthiana Carrière