Lupinus argenteus var. rubricaulis
Great Basin Naturalist 38: 326. 1978.
Endemic
Basionym: Lupinus rubricaulis Greene Pl. Baker. 3: 35. 1901
Synonyms: L. alpestris A. Nelson L. alsophilus Greene L. argenteus var. depressus (Rydberg) C. L. Hitchcock L. caudatus var. rubricaulis (Greene) C. P. Smith L. depressus Rydberg L. maculatus Rydberg L. monticola Rydberg L. pulcherrimus Rydberg
Treatment appears in FNA Volume 11.
Herbs 2–5.5 dm, glabrous or pubescent. Stems unbranched. Leaves cauline; leaflet blades green, flat, oblanceolate, surfaces glabrous or adaxially pubescent. Racemes solitary, terminal. Pedicels 3–4 mm. Flowers 8–11 mm; calyx bulge 0–1 mm, but not elongated into a spur; corolla blue, banner spot yellow, glabrous or hairy abaxially. 2n = 48.
Phenology: Flowering Jun–Sep.
Habitat: Moist places in forests.
Elevation: (2200–)2400–3400 m.
Distribution
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B.C., Ariz., Colo., Idaho, Mont., Nev., Utah, Wyo.
Discussion
Variety rubricaulis ranges from British Columbia to Montana, southward into northeastern Nevada, the Uinta and Wasatch mountains in Utah, Apache and Coconino counties in Arizona, and western Colorado. It is very similar to var. argenteus but found in more moist or mesic habitats.
Selected References
None.
Lower Taxa
None.