Lupinus polyphyllus var. humicola
Great Basin Naturalist 46: 257. 1986.
Endemic
Basionym: Lupinus humicola A. Nelson Bull. Torrey Bot. Club 25: 204. 1898
Synonyms: L. arcticus var. cottonii (C. P. Smith) C. P. Smith L. arcticus var. humicola (A. Nelson) C. P. Smith L. arcticus var. tetonensis (E. E. Nelson) C. P. Smith L. cottonii C. P. Smith L. diversalpicola C. P. Smith L. flavescens Rydberg L. holmgrenianus C. P. Smith L. humicola var. tetonensis E. E. Nelson L. rydbergii Blankinship L. wyethii S. Watson L. wyethii subsp. tetonensis (E. E. Nelson) B. J. Cox & D. B. Dunn
Treatment appears in FNA Volume 11.
Herbs 2–4.5(–7) dm, caudex above ground. Stems ascending, not hollow. Leaflets (5–)7–12, blades 30–55(–70) mm, surfaces silky-strigulose, gray or silver, often folded, appearing linear. Flowers: upper keel margins usually ciliate. 2n = 48.
Phenology: Flowering (Apr–)May–Jun(–Sep).
Habitat: Dry desert slopes, dry washes, pinyon-juniper woodlands, grassy sites, thinly wooded sites.
Elevation: 1400–2500 m.
Distribution
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Alta., B.C., Ariz., Calif., Colo., Idaho, Mont., Nev., Oreg., Utah, Wash., Wyo.
Discussion
Variety humicola is of conservation concern in California, where it is known only from Inyo County. In Arizona, it is known only from Navajo County, south of Lake Powell.
Selected References
None.
Lower Taxa
None.