Penstemon of the day: Penstemon albomarginatus
Penstemon albomarginatus is a member of subgenus Penstemon, section Penstemon, subsection Arenarii. There are two species in this subsection, both …
Penstemon albomarginatus is a member of subgenus Penstemon, section Penstemon, subsection Arenarii. There are two species in this subsection, both …