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Summary

Oxypetalum is a genus of flowering plants in the family Apocynaceae, first described with this name in 1810. The genus is native to South America.
Oxypetalum coeruleum is cultivated as an ornamental.

Species

As of November 2023, Plants of the World Online accepted the following species:

Oxypetalum acerosum Malme – Paraguay Oxypetalum aequaliflorum E.Fourn. – Brazil Oxypetalum albicans Schltr. – Brazil Oxypetalum alpinum (Vell.) Fontella & E.A.Schwarz – Brazil Oxypetalum appendiculatum Mart. – Paraguay, Brazil Oxypetalum arachnoideum E.Fourn. – Rio de Janeiro Oxypetalum arenicola Hauman ex Lillo – Argentina Oxypetalum argentinum Malme – Argentina Oxypetalum arnottianum H.Buek – Brazil Oxypetalum attenuatum (Rusby) Malme – Bolivia Oxypetalum aurantiacum Malme ex Chodat & Hassl. – Paraguay Oxypetalum balansae Malme – Paraguay Oxypetalum banksii R.Br. ex Schult. – Bahia Oxypetalum barberoanum T.Mey. – Paraguay Oxypetalum boliviense Schltr. – Bolivia Oxypetalum boudetii Fontella & Goes – Brazil (Espírito Santo) Oxypetalum brachystemma Malme – Argentina, Bolivia Oxypetalum brachystephanum (Malme) Malme – Paraguay Oxypetalum brussae H.A.Keller & Andrés González – Uruguay Oxypetalum capitatum Mart. – Brazil, Bolivia, Venezuela, Guyana, Suriname Oxypetalum ceratostemma Malme – Paraguay Oxypetalum charrua T.Mey. – Brazil, Argentina, Chile Oxypetalum chodatianum Malme – Paraguay Oxypetalum coalitum E.Fourn. – Brazil Oxypetalum coccineum -Griseb. – Argentina Oxypetalum coeruleum (D.Don ex Sweet) Decne. – Argentina Oxypetalum commersonianum (Decne.) Fontella & E.A.Schwarz – Uruguay Oxypetalum confusum Malme – Rio Grande do Sul Oxypetalum cordifolium (Vent.) Schltr. – widespread from Cuba + San Luis Potosí south to Peru Oxypetalum corymbosum (Malme) Liede & Meve – eastern Bolivia to Paraguay, northeastern Argentina (Corrientes), and eastern Brazil Oxypetalum costae Occhioni – Rio de...