Penstemon ambiguus var. laevissimus (Keck) N. Holmgren
Plantaginaceae
Wendy C. Hodgson
28986
2013-09-01
Bailey Ablitt, Stephanie Smith, Cass Blodgett
United States, Arizona, Coconino, Vermilion Cliffs National Monument, near south end of Paria Plateau, along abandoned road that ends at south edge that overlooks Hancock Spring.