# Ruehssia

Ruehssia is a genus of plants in the family Apocynaceae. It is also in the Asclepiadoideae subfamily and Marsdenieae tribe.
Its native range is tropical and subtropical South America. It is found in Argentina (north-eastern and north-western), Belize, Bolivia, Brazil (north, north-eastern, south, south-eastern and west-central), Colombia, Costa Rica, Cuba, Dominican Republic, Ecuador, El Salvador, French Guiana, Guatemala, Guyana, Haiti, Honduras, Jamaica, the Leeward Islands, Mexico (north-eastern, south-eastern and south-western), Nicaragua, Panamá, Paraguay, Peru, Suriname, Trinidad and Tobago, Uruguay, Venezuela and the Windward Islands.
The genus name of Ruehssia is in honour of Carl Andreas Rühsz (1805–1880), the German consul in Puerto Cabello, Venezuela. He was a supporter of art and science. It was first described and published in Verh. Vereins Beförd. Gartenbaues Königl. Preuss. Staaten Vol.19 on page 304 in 1849.

## Species

As of November 2023, Plants of the World Online accepted the following species:
* Ruehssia altissima (Jacq.) F.Esp.Santo & Rapini
* Ruehssia amorimii (Morillo) F.Esp.Santo & Rapini
* Ruehssia amylacea (Barb.Rodr.) F.Esp.Santo & Rapini
* Ruehssia asclepioidea (Rusby) Liede & H.A.Keller
* Ruehssia asplundii (Morillo & Spellman) Liede & H.A.Keller
* Ruehssia astephanoides (A.Gray) L.O.Alvarado
* Ruehssia avacanoeira (F.Esp.Santo) F.Esp.Santo & Rapini
* Ruehssia beatricis (Morillo) Liede & H.A.Keller
* Ruehssia bergii (Morillo) F.Esp.Santo & Rapini
* Ruehssia bourgaeana (Baill.) L.O.Alvarado
* Ruehssia brasiliensis (Decne.) F.Esp.Santo & Rapini
* Ruehssia breviramosa (Rapini & Fontella) F.Esp.Santo & Rapini
* Ruehssia caatingae (Morillo) F.Esp.Santo & Rapini
* Ruehssia calcaria (F.Esp.Santo) F.Esp.Santo & Rapini
* Ruehssia calichicola (Carnevali & Juárez-Jaimes) L.O.Alvarado
* Ruehssia callosa (Juárez-Jaimes & W.D.Stevens) L.O.Alvarado
* Ruehssia carterae (W.D.Stevens & Juárez-Jaimes) L.O.Alvarado
* Ruehssia carvalhoi (Morillo & Carnevali) F.Esp.Santo & Rapini
* Ruehssia castillonii (Lillo ex T.Mey.) H.A.Keller & Liede
* Ruehssia clausa (R.Br.) Liede, S.Reuss & Meve
* Ruehssia colombiana (Morillo) Liede & H.A.Keller
* Ruehssia condensiflora (S.F.Blake) Liede & H.A.Keller
* Ruehssia coulteri (Hemsl.) L.O.Alvarado
* Ruehssia cubensis (Turcz.) Liede, S.Reuss & Meve
* Ruehssia cuixmalensis (Juárez-Jaimes & L.O.Alvarado) L.O.Alvarado
* Ruehssia cundurango (Triana) Liede & H.A.Keller
* Ruehssia dictyophylla (Urb.) Acev.-Rodr.
* Ruehssia dorothyae (Fontella & Morillo) F.Esp.Santo & Rapini
* Ruehssia dussii (Schltr.) Acev.-Rodr.
* Ruehssia ecuadorensis (Morillo & Spellman) Liede & H.A.Keller
* Ruehssia edulis (S.Watson) L.O.Alvarado
* Ruehssia ekmanii (Alain) Acev.-Rodr.
* Ruehssia elliptica (Decne.) Acev.-Rodr.
* Ruehssia fontellana (Morillo & Carnevali) F.Esp.Santo & Rapini
* Ruehssia fruticosa (Donn.Sm.) L.O.Alvarado
* Ruehssia fusca (C.Wright ex Griseb.) Liede, S.Reuss & Meve
* Ruehssia gallardoae (Lozada-Pérez) Lozada-Pérez
* Ruehssia gillespieae (Morillo) Liede & H.A.Keller
* Ruehssia gualanensis (Donn.Sm.) L.O.Alvarado
* Ruehssia guanchezii (Morillo) Liede & H.A.Keller
* Ruehssia guaranitica (Malme) Liede & H.A.Keller
* Ruehssia gymnemoides (W.Rothe) L.O.Alvarado
* Ruehssia haitiensis (Urb.) Acev.-Rodr.
* Ruehssia hassleriana (Malme) Liede & H.A.Keller
* Ruehssia hatschbachii (Morillo) F.Esp.Santo & Rapini
* Ruehssia heringeri (Fontella) F.Esp.Santo & Rapini
* Ruehssia hilariana (E.Fourn.) F.Esp.Santo & Rapini
* Ruehssia hiriartiana (Juárez-Jaimes & W.D.Stevens) L.O.Alvarado
* Ruehssia lanata (Paul G.Wilson) L.O.Alvarado
* Ruehssia lauretiana (Woodson) F.Esp.Santo & Rapini
* Ruehssia laxiflora (Donn.Sm.) Gonz.-Martínez & Lozada-Pérez
* Ruehssia lindenii S.Reuss, Manitz & Liede
* Ruehssia linearis (Decne.) Liede, S.Reuss & Meve
* Ruehssia longiflora (A.Rich.) Liede, S.Reuss & Meve
* Ruehssia loniceroides (Hook.) F.Esp.Santo & Rapini
* Ruehssia ludani (Juárez-Jaimes & Saynes) L.O.Alvarado
* Ruehssia macfadyenii (Rendle) Acev.-Rodr.
* Ruehssia macroglossa (Schltr.) Acev.-Rodr.
* Ruehssia macrophylla (Humb. & Bonpl. ex Schult.) H.Karst.
* Ruehssia magallanesiana (Juárez-Jaimes) L.O.Alvarado
* Ruehssia malmeana (W.Rothe) F.Esp.Santo & Rapini
* Ruehssia mayana (Lundell) L.O.Alvarado
* Ruehssia megalantha (Goyder & Morillo) F.Esp.Santo & Rapini
* Ruehssia mexicana (Decne.) L.O.Alvarado
* Ruehssia micrantha (Alain) Liede, S.Reuss & Meve
* Ruehssia microcarpa (Juárez-Jaimes & Lozada-Pérez) L.O.Alvarado
* Ruehssia minutiflora (F.Esp.Santo) F.Esp.Santo & Rapini
* Ruehssia mollis (Brandegee) L.O.Alvarado
* Ruehssia montana (Malme) F.Esp.Santo & Rapini
* Ruehssia naiguatensis (Morillo) Liede & H.A.Keller
* Ruehssia nana (Rapini & Fontella) F.Esp.Santo & Rapini
* Ruehssia neomanarae (Morillo) F.Esp.Santo & Rapini
* Ruehssia neriifolia (Decne.) L.O.Alvarado
* Ruehssia nitida (Poir.) Acev.-Rodr.
* Ruehssia nubicola (Alain) Acev.-Rodr.
* Ruehssia oaxacana (Morillo) L.O.Alvarado
* Ruehssia oligantha (K.Schum.) Liede & H.A.Keller
* Ruehssia otoniensis (Fontella & Morillo) F.Esp.Santo & Rapini
* Ruehssia paganuccii (F.Esp.Santo & A.P.B.Santos) F.Esp.Santo & Rapini
* Ruehssia paraguaiensis (Morillo) Liede & H.A.Keller
* Ruehssia paraibana (F.Esp.Santo & A.P.B.Santos) F.Esp.Santo & Rapini
* Ruehssia parvifolia (Brandegee) L.O.Alvarado
* Ruehssia phallica (F.Esp.Santo) F.Esp.Santo & Rapini
* Ruehssia pickelii (Fontella & Morillo) F.Esp.Santo & Rapini
* Ruehssia pinetorum (Standl. & L.O.Williams) Gonz.-Martínez & Lozada-Pérez
* Ruehssia popoluca (Juárez-Jaimes & A.Campos) L.O.Alvarado
* Ruehssia pringlei (S.Watson) L.O.Alvarado
* Ruehssia propinqua (Hemsl.) L.O.Alvarado
* Ruehssia quirinopolensis I.L.Morais & F.Esp.Santo
* Ruehssia riparia (Morillo & Spellman) F.Esp.Santo & Rapini
* Ruehssia robinsonii (J.R.Johnst.) Liede & H.A.Keller
* Ruehssia rotheana (Woodson) Liede & H.A.Keller
* Ruehssia rubrofusca (E.Fourn.) F.Esp.Santo & Rapini
* Ruehssia rupestris (F.Esp.Santo) F.Esp.Santo & Rapini
* Ruehssia rzedowskiana (Juárez-Jaimes & W.D.Stevens) L.O.Alvarado
* Ruehssia salaschiblii (L.O.Alvarado & K.Maya M.) K.Maya M.
* Ruehssia saturejifolia (A.Rich.) Liede, S.Reuss & Meve
* Ruehssia schlechteriana (W.Rothe) L.O.Alvarado
* Ruehssia serpentina (F.Esp.Santo) F.Esp.Santo & Rapini
* Ruehssia sessilifolia (E.Fourn.) F.Esp.Santo & Rapini
* Ruehssia smithii (Morillo) Liede & H.A.Keller
* Ruehssia spiralis (W.Rothe) Liede & H.A.Keller
* Ruehssia sprucei (W.Rothe) F.Esp.Santo & Rapini
* Ruehssia stephanotidifolia (Woodson) L.O.Alvarado
* Ruehssia stevensiana (Juárez-Jaimes) L.O.Alvarado
* Ruehssia steyermarkii (Woodson) L.O.Alvarado
* Ruehssia suberosa (E.Fourn.) F.Esp.Santo & Rapini
* Ruehssia suffruticosa (Alain) Acev.-Rodr.
* Ruehssia sumiderensis Lozada-Pérez, Ram.-Mar. & Gonz.-Martínez
* Ruehssia tholiformis (Juárez-Jaimes & L.O.Alvarado) L.O.Alvarado
* Ruehssia thomasii (Morillo) F.Esp.Santo & Rapini
* Ruehssia tolimensis (Morillo) Liede & H.A.Keller
* Ruehssia tressensiae (S.A.Cáceres & Morillo) H.A.Keller & Liede
* Ruehssia trisegmentata (F.Esp.Santo & A.P.B.Santos) F.Esp.Santo & Rapini
* Ruehssia trivirgulata (Bartlett) L.O.Alvarado
* Ruehssia troyana (Urb.) Acev.-Rodr.
* Ruehssia tubularis (L.O.Williams) L.O.Alvarado
* Ruehssia ulei (Schltr. & W.Rothe) F.Esp.Santo & Rapini
* Ruehssia umbellata (Griseb.) Liede, S.Reuss & Meve
* Ruehssia undulata (Jacq.) Liede & H.A.Keller
* Ruehssia veronicae (W.D.Stevens) L.O.Alvarado
* Ruehssia vinciflora (Griseb.) Liede, S.Reuss & Meve
* Ruehssia virgultorum (E.Fourn.) F.Esp.Santo & Rapini
* Ruehssia weberbaueri (Schltr. & W.Rothe) Liede & H.A.Keller
* Ruehssia weddellii (E.Fourn.) F.Esp.Santo & Rapini
* Ruehssia woodburyana (Acev.-Rodr.) Goyder
* Ruehssia xerohylica (Dugand) Liede & H.A.Keller
* Ruehssia yamanigueyensis Mangelsdorff
* Ruehssia zehntneri (Fontella) F.Esp.Santo & Rapini
* Ruehssia zimapanica (Hemsl.) L.O.Alvarado