horny margins. Flowers ca 30 cm long, petals white, tinged pinkish near base or entirely pink. Tube with distant bracts. Stigma lobes usually forked. Fruit red with purple pulp. | Colombia, Costa Rica, Ecuador, Nicaragua, Panamá, Peru, Trinidad and Tobago, Venezuela and the Venezuelan Antilles | | |- | Selenicereus murrilliiBritton & Rose |Stems only 8 mm thick, nearly spineless. Flowers 15 cm long, spiny, hairless. Closely related to S. spinulous and S. inermis (sensu lat.). |Mexico. | | |- | Selenicereus nelsonii(Weing.) Britton & Rose |Flowers 20 cm long, receptacle hairless, spiny. Possibly conspecific with S. vagans. |Mexico. | | |- | Selenicereus ocamponis(Salm-Dyck) D.R.Hunt(syn. incl. H. guatemalense, H. purpursii, H. ocamponis) |Stems white-waxy, margins horny, spines needle-like, to 12 mm long. Flowers 25–32 cm long with white inner petals. Bracts overlapping, with purple margins. | Mexico | | |- | Selenicereus pteranthus(Link ex A.Dietr.) Britton & Rose |Two forms are recognized: f. macdonaldiae - Honduras? Stem ribs tubercled. Flowers 30–34 cm long. f. pteranthus - Mexico. Stems thick, 4-5-ribbed, spines very short. Flowers 25–30 cm long. |The Bahamas, Belize, the Cayman Islands, Cuba, the Dominican Republic and Mexico. | | |- | Selenicereus purpusii(Weing.) Arias & Korotkova | | Mexico | | |- | Selenicereus setaceus(Salm-Dyck ex DC.) A.Berger ex Werderm. |Stems green without horny margins, rather spiny. Flowers 19–22 cm with small tubercles and bracts. Fruit red. | Argentina, Bolivia, Brazil and Paraguay | | |- | Selenicereus spinulosus(DC.) Britton & Rose | |Texas, Mexico. Stems short-spined. Flowers 8–14 cm long, receptacle spiny, hairless. | | |- | Selenicereus stenopterus(F.A.C.Weber) D.R.Hunt |Stems thin, soft, green. Flowers 9–10 cm long, 13–15 cm wide, tube short, tepals purplish red. | Costa Rica | | |- | Selenicereus tonduzii(F.A.C.Weber) S. Arias & Korotkova(syn. Weberocereus tonduzii) | |Costa Rica and Panama | | |- | Selenicereus triangularis(L.) D.R.Hunt |Stems green without horny margins, slender. Flowers ca. 20 cm long, base with wide overlapping scales | Cuba, the Dominican Republic, Haiti, the Leeward Islands, Puerto Rico and the Windward Islands | | |- | Selenicereus tricaeD.R.Hunt | | Belize, Guatemala and Mexico | | |- | Selenicereus trigonus(Haw.) S. Arias & Korotkova |Stems green without horny margins. Flowers ca. 22 cm long, 21 cm wide, base with small, narrow, widely spaced scales, sometimes spiny. Fruit red. May be a synonym of Selenicereus triangularis| the Caribbean. | |- | Selenicereus undatus(Haw.) D.R.Hunt |Stems