Penstemon fruticosus is a member of subgenus Dasanthera, the basal lineage of the genus. It’s somewhat similar to P. davidsonii in appearance, except the leaves are very distinctive. Serrated in P. fruticosus, mostly entire in P. davidsonii. The latter species has a more western distribution as well – for example, in the Cascades, one finds P. davidsonii var. davidsonii mostly one the western side of the range and P. fruticosus on the eastern side.
Photos by Andi Wolfe ©2013 – All rights reserved.