Pterostemma is a genus of flowering plants from the orchid family, Orchidaceae. It contains 3 known species, native to Colombia and Ecuador. Species accepted as of June 2014: \n* Pterostemma antioquiense F.Lehm. & Kraenzl. \n* Pterostemma benzingii (Dodson) M.W.Chase & N.H.Williams \n* Pterostemma escobarii (Dodson) M.W.Chase & N.H.Williams