Penstemon barbatus (Cav.) Roth [ Chelone barbata Cav.]
no HD illustration available (m1)
Penstemon barbatus (Cav.) Roth [ Chelone barbata Cav.] [Scrophulariaceae]
Allg. Teutsch. Gart.-Mag., vol. 7 : t. 19 (1810)