Taxonomy
- Taxonomic Rank
- Variety
- Author
- (D.D.Keck) N.H.Holmgren
- Publication
- Brittonia 31: 104 (1979)
Superior Taxa
- Kingdom
- Plantae
- Subkingdom
- Pteridobiotina
- Phylum
- Angiosperms
- Order
- Lamiales
- Family
- Plantaginaceae
- Genus
- Penstemon
- Species
- Penstemon ambiguus