Penstemon fruticosus subsp. scouleri (Lindley) Pennell & D.D. Keck

Penstemon fruticosus subsp. scouleri (Lindley) Pennell & D.D. Keck is a synonym sensu FNA Ed. Comm., 2019 of:

Penstemon fruticosus var. scouleri (Lindley) Cronquist, an accepted variety name sensu FNA Ed. Comm., 2019.