Taxon:
Penstemon procerus Douglas ex Graham subsp. tolmiei (Hook.) D. D. Keck
Summary
Place of publication:
Brittonia 8:249. 1957
Verified:
08/21/1997
ARS Systematic Botanists.
Autonyms (not in current use), synonyms and invalid designations
Reference(s)
- Hitchcock, C. L. & A. Cronquist. 1973. Flora of the Pacific Northwest: an illustrated manual.
- Hitchcock, C. L. et al. 1955-1969. Vascular plants of the Pacific Northwest.
- Kartesz, J. T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland.