1. Large genus of subshrubs or herbs having showy blue or purple or red or yellow or white flowers; mostly western North America
   "The rocky garden was filled with colourful penstemon";
   - Penstemon, genus Penstemon, Pentstemon

Derived forms: penstemons

Type of: asterid dicot genus

Part of: family Scrophulariaceae, figwort family, foxglove family, Scrophulariaceae

Encyclopedia: Penstemon