Penstemon barbatus (Cav.) Roth [ Chelone barbata Cav.]
no HD illustration available (m1)
Penstemon barbatus (Cav.) Roth [ Chelone barbata Cav.] [Scrophulariaceae]
S.T. Edwards, Bot. Reg., vol. 2 : t. 116 (1816) [S. Edwards]