penstemon n large genus of subshrubs or herbs having showy blue or purple or red or yellow or white flowers; mostly western North America Synonym(s) Penstemon genus Penstemon
News & Articles penstemon June is for penstemons Palmer's penstemon is stately in appearance. The dark pink guidelines on the lower lobes direct pollinators to its nectar. / Provided by John P. Weiser June 22, 2013 - Reno Gazette-Journal