Petalostelma

{{Short description|Genus of flowering plants}}

{{Automatic taxobox

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|display_parents = 2

|taxon = Petalostelma

|authority = E.Fourn.

|type_species = Petalostelma martianum

|type_species_authority = (Decne.) E.Fourn.

|synonyms = {{Genus list|

Lagoa|T.Durand|

Zygostelma|E.Fourn.|

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Petalostelma is a genus of flowering plants in the family Apocynaceae, first described as a genus in 1885.[https://www.biodiversitylibrary.org/page/140466#page/222/mode/1up Fournier, Eugène Pierre Nicolas. 1885. Petalostelma in Martius, Carl Friedrich Philipp von, Flora Brasiliensis 6(4): 328, pl. 98] in Latin They are native to South America.Forzza, R. C. 2010. Lista de espécies Flora do Brasil http://floradobrasil.jbrj.gov.br/2010 {{Webarchive|url=https://web.archive.org/web/20150906080403/http://floradobrasil.jbrj.gov.br/2010 |date=2015-09-06 }}. Jardim Botânico do Rio de Janeiro, Rio de JaneiroSerrano, M. & J. Terán. 1998. Identificación de Especies Vegetales en Chuquisaca -- Teoría, Práctica y Resultados 1–129. PLAFOR, Intercooperación, Fundación Ceibo, Sucre, Bolivia

;Species[http://www.theplantlist.org/tpl1.1/search?q=Petalostelma The Plant List, genus Petalostelma]

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1. Petalostelma bracteolatum (E.Fourn.) Fontella - Rio de Janeiro
2. Petalostelma calcaratum (Decne.) Fontella - Brazil
3. Petalostelma cearense Malme - Ceará
4. Petalostelma dardanoi Fontella - Pernambuco
5. Petalostelma martianum (Decne.) E.Fourn. - Brazil
6. Petalostelma robertii (S.Moore) Liede & Meve - Matto Grosso
7. Petalostelma sarcostemma (Lillo) Liede & Meve - Salta in Argentina, Chuquisaca in Bolivia

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