Penstemon heterodoxus var. shastensis (D.D.Keck) N.H.Holmgren
, Brittonia 44: 482 (1992).- IPNI Life Sciences Identifier (LSID)
- urn:lsid:ipni.org:names:1013259-2
- Publication
- Brittonia; a Series of Botanical Papers. New York, NY
- Collation
- 44: 482
- Family as entered in IPNI
- Scrophulariaceae