As classified in WFO snapshot
December 2024
latest classification for this taxon
subspecies
Penstemon fruticosus subsp. cardwellii
(Howell) Piper
This subspecies name was first published in Contr. U.S. Natl. Herb. 11: 499 (1906)
This subspecies name has been reclassified since this snapshot. Its current preferred usage is a synonym .