Penstemon heterodoxus var. shastensis (D.D.Keck) N.H.Holmgren
, Brittonia 44(4): 482 (1992).
External links to taxonomic opinions:
- IPNI Life Sciences Identifier (LSID)
- urn:lsid:ipni.org:names:970361-1
- Publication
- Brittonia; a Series of Botanical Papers. New York, NY
- Collation
- 44(4): 482
- Date of Publication
- 11 Dec 1992
- Family as entered in IPNI
- Scrophulariaceae