Penstemon xylusA. Nelson (redirected from: Penstemon caespitosus subsp. suffruticosus (A. Gray) D. D. Keck)
Family: Plantaginaceae
[Penstemon caespitosus subsp. suffruticosus (A. Gray) D. D. Keck, morePenstemon caespitosus var. suffruticosus A. Gray, Penstemon tusharensis N. H. Holmgren]