Lupinus argenteus var. argenteus
Herbs 2–15 dm, hairs forwardly appressed. Stems branched. Leaves cauline; petiole 1–5 cm; leaflet blades narrow and often folded, oblanceolate or elliptic-oblanceolate, surfaces gray or silver-pubescent. Pedicels (1–)2–5(–6) mm. Flowers (7–)8–12 mm; calyx bulge less than 1 mm; corolla blue, purple, pink, or white, banner ± hairy abaxially. 2n = 48.
Phenology: Flowering Jun–Oct.
Habitat: Dry sagebrush scrub, meadows, openings in conifer forests.
Elevation: 1000–2000 m.
Distribution
Alta., Sask., Ariz., Calif., Colo., Idaho, Mont., Nev., N.Mex., N.Dak., Oreg., S.Dak., Utah, Wyo.
Discussion
Variety argenteus is known from the Panamint Mountains in eastern California to southern Canada, western North Dakota, western South Dakota, Colorado, and central New Mexico. It is widespread in the intermountain region in Arizona, southern Idaho, Nevada, eastern Oregon, Utah, and southwestern Wyoming.
Lupinus lemmonii C. P. Smith belongs here since D. Isely (1998) and T. H. Kearney and R. H. Peebles (1960) stated that the only diagnostic character that differentiates this from var. argenteus is its southern location.
Selected References
None.