''Oxypetalum'' is a genus of flowering plants in the family

Apocynaceae Apocynaceae (, from '' Apocynum'', Greek for "dog-away") is a family of flowering plants that includes trees, shrubs, herbs, stem succulents, and vines, commonly known as the dogbane family, because some taxa were used as dog poison. Notable mem ...

, first described with this name in 1810. The genus is native to

South America South America is a continent entirely in the Western Hemisphere and mostly in the Southern Hemisphere, with a considerably smaller portion in the Northern Hemisphere. It can also be described as the southern Subregion#Americas, subregion o ...

.Funk, V. A., P. E. Berry, S. Alexander, T. H. Hollowell & C. L. Kelloff. 2007. Checklist of the Plants of the Guiana Shield (Venezuela: Amazonas, Bolivar, Delta Amacuro; Guyana, Surinam, French Guiana). Contributions from the United States National Herbarium 55: 1–584 ''

Oxypetalum coeruleum ''Oxypetalum coeruleum'' is a species of flowering plant, native to South America from southern Brazil to Uruguay. The synonymous name ''Tweedia caerulea'' is also used. Growing to long, it is a straggling evergreen perennial with heart shaped, ...

'' is cultivated as an ornamental.

Species

Plants of the World Online Plants of the World Online (POWO) is an online taxonomic database published by the Royal Botanic Gardens, Kew. History Following the Convention on Biological Diversity, the Royal Botanic Gardens in Kew launched Plants of the World Online i ...

accepted the following species: ;formerly includedThe Plant List, genus ''Oxypetalum''
/ref> moved to other genera ''(

Cynanchum ''Cynanchum'' is a genus of about 300 species including some swallowworts, belonging to the family Apocynaceae. The taxon name comes from Greek ''kynos'' (meaning "dog") and ''anchein'' ("to choke"), hence the common name for several species is ...

, Morrenia,

Philibertia ''Philibertia'' is a genus of flowering plants in the family Apocynaceae, first described as a genus in 1819. It is native to South America.Holm, R. W. 1950. The American species of ''Sarcostemma'' R. Br. (Asclepiadaceae). Annals of the Missouri ...

Tassadia ''Tassadia'' is a genus of plants in the family Apocynaceae, first described as a genus in 1844. It is native primarily to South America, with one species extending north into Central America, S Mexico, and Trinidad.Hokche, O., P. E. Berry & O. H ...

, Tweedia)''

References

{{Taxonbar, from=Q148795 Asclepiadoideae Apocynaceae genera Flora of Southern America Plants described in 1810 Taxa named by Robert Brown (botanist, born 1773)