Herbs, perennial, 2–10+ dm, green, densely hairy. Cotyledons deciduous, petiolate. Stems erect or ascending, branched. Leaves cauline; stipules not leaflike, green to silvery, 3–15 mm; petiole 2–6 cm; leaflets 6–9, blades 20–60 × 5–10 mm, adaxial surface pubescent. Peduncles 1–8.5 cm; bracts deciduous, 2–10 mm. Racemes open, 2–23 cm; flowers ± whorled. Pedicels 1.5–5 mm. Flowers 9–12 mm; calyx bulge or spur 0–1 mm, abaxial lobe 2 or 3-toothed, 3–8 mm, adaxial lobe 2-toothed, 5–7 mm; corolla usually light blue or lavender to purple, rarely white, banner patch white turning purple, banner glabrous abaxially, keel upcurved, glabrous, banner ovate, wings wide, covering keel tip. Legumes 2–4.5 cm, silky. Seeds 4–6, brown, mottled tan, 4–6 mm.

Phenology: Flowering Jun–Sep.
Habitat: Dry slopes, yellow pine, lodge­pole pine, and white and red fir forests.
Elevation: 1500–3000 m.

Distribution

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Calif., Nev., Oreg.

Discussion

Lupinus andersonii is found widely in regions of the Sierra Nevada in California and western Nevada plus adjacent areas of southern Oregon. The erect branch­ing with puberulent leaflets and a banner that is gla­brous abaxially distinguish it from L. angustiflorus, L. apertus, and L. padrecrowleyi, which have pubescence at least on the abaxial crest of the banner. According to P. A. Munz (1959), L. egressus C. P. Smith may be of hybrid origin (L. fulcratus × L. andersonii).

Selected References

None.

Lower Taxa

None.