As classified in WFO snapshot
December 2024
latest classification for this taxon
subspecies
Penstemon attenuatus subsp. hyacinthinus
Pennell
This subspecies name was first published in Notul. Nat. Acad. Nat. Sci. Philadelphia 71: 8 (1941)
This subspecies name has been reclassified since this snapshot. Its current preferred usage is a synonym .