As classified in WFO snapshot
June 2024
Warning: older classification
variety
Penstemon fruticosus var. crassifolius
(Lindl.) Krautter
This variety name was first published in Contr. Bot. Lab. Morris Arbor. Univ. Pennsylvania 3: 100 (1908)
This variety name has been reclassified since this snapshot. Its current preferred usage is a synonym .