Penstemon caeruleus E.Vilm. Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Lamiales family Plantaginaceae genus Penstemon species Penstemon hartwegii Name Homonyms Penstemon caeruleus Nutt. Penstemon caeruleus E.Vilm. Penstemon caeruleus Bailly Penstemon caeruleus Torr.