Polystemma

Polystemma is a genus of flowering plants of the family Apocynaceae first established as a genus in 1844. It is native to Mexico and Central America.

Species
, Plants of the World Online accepted the following species:
 * Polystemma canisferum McDonnell & Fishbein
 * Polystemma cordatum (Brandegee) L.O.Alvarado
 * Polystemma cordifolium ( A.Gray) McDonnell & Fishbei n
 * Polystemma fishbeiniana V.W.Steinm. & W.D.Stevens
 * Polystemma guatemalense (Schltr.) W.D.Stevens
 * Polystemma mirandae Lozada-Pérez
 * Polystemma scopulorum Brandegee