Penstemon barbatus (Cav.) Roth [ Chelone barbata Cav.]
no HD illustration available (m1)
Penstemon barbatus (Cav.) Roth [ Chelone barbata Cav.] [Scrophulariaceae]
J.S. Kerner, Hort. Semperv., vol. 4 : t. 39 (1799) [J.S. Kerner]