''Petalostelma'' is a genus of

flowering plant Flowering plants are plants that bear flowers and fruits, and form the clade Angiospermae (), commonly called angiosperms. The term "angiosperm" is derived from the Greek words ('container, vessel') and ('seed'), and refers to those plants th ...

s 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 as a genus in 1885. They are 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 ...

.Serrano, M. & J. Terán. 1998. Identificación de Especies Vegetales en Chuquisaca -- Teoría, Práctica y Resultados 1–129. PLAFOR, Intercooperación, Fundación Ceibo, Sucre, Bolivia ;Species The Plant List, genus ''Petalostelma''
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References

{{Taxonbar, from=Q6073290 Apocynaceae genera Asclepiadoideae