Penstemon barbatus (Cav.) Roth [ Chelone barbata Cav.]
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Penstemon barbatus (Cav.) Roth [ Chelone barbata Cav.] [Scrophulariaceae]
B. Maund, Bot. Gard., vol. 1 : t. 21, fig. 1 (1825) [E.D. Smith]