Begonia (sect. Ruizopavonia) De Candolle 1859
Creators: name: Jara-Muñoz, O. A.
name: Moonlight, P. W.
name: Zabala-Rivera, J. C.
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Cucurbitales
Begoniaceae
Begonia

description: Key to the Colombian species of Begonia sect. Ruizopavonia [based on Tebbitt et al. (2017) and Moonlight & Pérez (2022)]
1. Stipules persistent, remaining on the stem long after the leaves........................................................................................................2
- Stipules early deciduous, lost before the leaves are fully grown .......................................................................................................3
2. Inflorescence branched; staminate flowers with 2 tepals and pistillate flowers with 4 tepals; wings of the fruit lunulate ................. ................................................................................................................................................................................. B. tonduzii C.DC.
- Inflorescence unbranched; staminate flowers with 4 tepals and pistillate flowers with 5 tepals; wings of the fruit deltate triangular................................................................................................................................................... B. embera Jara & D.Franco
3. Inflorescence internodes short, <2 mm long; pistillate flowers with 3 or 5 tepals............................................................................4
- Inflorescence internodes elongated,> 5 mm long; pistillate flowers with 2, 3 or 4 tepals ................................................................5
4. Stem and petioles glabrous; stamens ca. 20; pistillate tepals 3; ovary wing rounded.................. B. botryoides Moonlight & Tebbitt
- Stem and petioles villous; stamens ca. 8–12; pistillate tepals 5; ovary wing triangular ........................................ B. tiliifolia C. DC.
5. Staminate flowers with 2 tepals..........................................................................................................................................................6
- Staminate flowers with 4 tepals..........................................................................................................................................................8
6. Pistillate flowers with 4 tepals; filaments exceeding the anthers in length..................... Begonia xylopoda L.B. Sm. & B.G. Schub.
- Pistillate flowers with 2 or 3 tepals; anthers exceeding the filaments in length.................................................................................7
7. Staminate tepals 4–5 mm long; connective shorter than the theca; pistillate flowers with 2 tepals ............. Begonia alnifolia A.DC.
- Staminate outer tepals ca. 16 mm long; connective as long as or exceeding the length of the theca; pistillate flowers with 3 tepals Begonia extensa L.B. Sm. & B.G. Schub.
8. Outer tepals on the staminate and pistillate flowers> 10 mm long ...................................................................................................9
- Outer tepals on the staminate and pistillate flowers <10 mm long .................................................................................................10
9. Leaves straight; bracts persistent; tepals orange or red with long-acuminate apex ............................................................................. ............................................................................................................................... Begonia cuatrecasasiana L.B.Sm. & B.G.Schub.
- Leaves transverse; bracts deciduous; tepals white or pink with rounded apex ...... Begonia betancurii Jara & Moonlight sp. nov.
10. Terrestrial herb to> 5 m tall; bracteoles lacking; pistillate flowers with 2 tepals... Begonia pseudodendron Moonlight & A.J.Pérez
- Terrestrial herb to <2 m tall; 2 or 3 bracteoles present directly beneath the ovary, persistent; pistillate flower with 3 tepals .......11
11. Peduncle hirsute; leaf laminae with 6–8 secondary veins on the broadest side; stamens c.20 ............................................................ ...................................................................................................................................... Begonia dugandiana L.B.Sm. & B.G.Schub.
- Peduncle glabrous; leaf laminae with 8–12 secondary veins on the broadest side; stamens> 25 ....................................................... ...................................................................................................................................... Begonia cymbalifera L.B.Sm. & B.G.Schub.
description: Published as part of Jara-Muñoz, O. A., Moonlight, P. W. & Zabala-Rivera, J. C., 2023, A New Species of Begonia (Begoniaceae) from the Eastern Cordillera of Colombia, pp. 169-175 in Phytotaxa 616 (2) on pages 173-174, DOI: 10.11646/phytotaxa.616.2.6, http://zenodo.org/record/8389621