What is "pterostemma"

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:

• Pterostemma antioquiense F.Lehm. & Kraenzl.
• Pterostemma benzingii (Dodson) M.W.Chase & N.H.Williams
• Pterostemma escobarii (Dodson) M.W.Chase & N.H.Williams