As classified in WFO snapshot
June 2024
Warning: older classification
subspecies
Penstemon menziesii subsp. davidsonii
(Greene) 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 .