As classified in WFO snapshot
December 2024
latest classification for this taxon
subspecies
Penstemon caespitosus subsp. perbrevis
Pennell
This subspecies name was first published in Contr. U.S. Natl. Herb. 20: 375 (1920)
This subspecies name has been reclassified since this snapshot. Its current preferred usage is a synonym .