''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 Members of the ...

, 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 relatively small portion in the Northern Hemisphere at the northern tip of the continent. It can also be described as the southe ...

.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. ;SpeciesThe Plant List, genus ''Oxypetalum''
/ref> ;formerly included moved to other genera ''( Calostigma,

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 ...

, Gothofreda, Morrenia, Philibertia,

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 South America