This report will inform a decision on whether to list the Graham’s beardtongue (Penstemon grahamii) and White River beardtongue (P. scariosus var. albifluvis) under the Endangered Species Act.
Penstemon grahamii is an herbaceous perennial plant within the sub genus Cristati (N. Holmgren in Cronquist et al. 1984). Each plant has one to three stems arising from a taproot. These stems are 7 18 centimeters (cm) (2.8 7.0 inches [in.]) tall. Leaves are borne in pairs opposite each other on...