External links to taxonomic opinions:
- IPNI Life Sciences Identifier (LSID)
- urn:lsid:ipni.org:names:187676-2
- Species Name
- Penstemon procerus Douglas ex Graham, Edinburgh New Philos. J. 7: 348 (1829).
- Publication
- Botanical Gazette; Paper of Botanical Notes. Crawfordsville, IN, Chicago, IL
- Collation
- 54: 146
- Family as entered in IPNI
- Scrophulariaceae