⚠ Version 1 of The Plant List has been superseded.
This name is in version 1.1 of The Plant List, record tro-50114913, with some changes.
This name is a synonym of Penstemon speciosus var. piliferus (A. Heller) Munz & I.M. Johnst..
The record derives from Tropicos which reports it as a synonym (record 50114913) with original publication details: Muhlenbergia 2(1C): 136-137 136 1906.