Penstemon laricifolius var. exilifolius

(A. Nelson) Payson

Univ. Wyoming Publ. Sci., Bot. 1: 97. 1924.

IllustratedEndemic
Basionym: Penstemon exilifolius A. Nelson Bull. Torrey Bot. Club 28: 230. 1901
Synonyms: P. laricifolius subsp. exilifolius (A. Nelson) D. D. Keck
Treatment appears in FNA Volume 17. Treatment on page 139. Mentioned on page 138.

Flowers: corolla white, 9–15 mm.


Phenology: Flowering Jun–Aug.
Habitat: Sandy or gravelly grasslands, sagebrush shrublands.
Elevation: 1500–2900 m.

Discussion

Variety exilifolius is concentrated in the Laramie Basin of Wyoming and Laramie River Valley of northwestern Larimer County, Colorado. Other isolated populations are known in Wyoming (B. L. Heidel and J. Handley 2007). A specimen from southern Montana, reported by Heidel and Handley, could be this variety; the specimen has not been seen for this study.

Lower Taxa

None.
Craig C. Freeman +
(A. Nelson) Payson +
Penstemon exilifolius +
Colo. +  and Wyo. +
1500–2900 m. +
Sandy or gravelly grasslands, sagebrush shrublands. +
Flowering Jun–Aug. +
Univ. Wyoming Publ. Sci., Bot. +
heidel2007a +
Illustrated +  and Endemic +
P. laricifolius subsp. exilifolius +
Penstemon laricifolius var. exilifolius +
Penstemon laricifolius +
variety +