Penstemon rydbergii var. aggregatus (Pennell) N.H.Holmgren

, Brittonia 31: 106 (1979).
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External links to taxonomic opinions:
WFO POWO
IPNI Life Sciences Identifier (LSID)
urn:lsid:ipni.org:names:187750-2
Publication
Brittonia; a Series of Botanical Papers. New York, NY
Collation
31: 106
Family as entered in IPNI
Scrophulariaceae

Links

Nomenclatural link
Penstemon aggregatus Pennell, Contr. U.S. Natl. Herb. 20: 367 (1920).
Same citation as
Penstemon rydbergii var. aggregatus (Pennell) N.H.Holmgren, Brittonia 31(1): 106 (1979).