Polystemma

{{Short description|Genus of plants}}

{{Automatic taxobox

|image = Polystemma guatemalense 1.jpg

|image_caption = Polystemma guatemalense

|display_parents = 2

|taxon = Polystemma

|authority = Decne.

|subdivision_ranks = Species

|subdivision = See text.

}}

Polystemma is a genus of flowering plants of the family Apocynaceae first established as a genus in 1844.[https://www.biodiversitylibrary.org/page/163558#page/610/mode/1up Decaisne, Joseph. 1844. Prodromus Systematis Naturalis Regni Vegetabilis 8: 602] in Latin It is native to Mexico and Central America.Davidse, G., M. Sousa Sánchez, S. Knapp & F. Chiang Cabrera. 2009. Cucurbitaceae a Polemoniaceae. 4(1): i–xvi, 1–855. In G. Davidse, M. Sousa Sánchez, S. Knapp & F. Chiang Cabrera (eds.) Flora Mesoamericana. Universidad Nacional Autónoma de México, MéxicoStevens, W. D. 2005. New and interesting milkweeds (Apocynaceae, Asclepiadoideae). Novon 15(4): 602–619García-Mendoza, A. J. & J A. Meave. 2011. Diversidad Florística de Oaxaca: de Musgos a Angispermas1–351. Universidad Nacional Autónoma de México, Ciudad Universitaria