Difference between revisions of "Lupinus apertus"
Muhlenbergia 8: 103, fig. 15. 1912.
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Latest revision as of 18:56, 12 March 2025
Herbs, perennial, 2–6 dm, green, puberulent to sparsely appressed-hairy. Cotyledons deciduous, petiolate. Stems erect, branched. Leaves cauline; stipules 5–10 mm; petiole 2–5 cm; leaflets 7–9, blades 25–55 × 4–12 mm, adaxial surface pubescent. Peduncles 1–8 cm; bracts deciduous, 3.5–5 mm. Racemes 8–11 cm; flowers spirally arranged to whorled. Pedicels 3–6 mm. Flowers 10–12 mm; calyx bulge or spur 0–1 mm, abaxial lobe entire or 3-toothed, 4.5–7 mm, adaxial lobe 2-toothed, 3.5–6 mm; corolla usually purple, sometimes pink or white, banner patch usually white, banner hairy abaxially, keel glabrous. Legumes 2–3 cm, hairy. Seeds 3 or 4, 5–6 mm.
Phenology: Flowering Jun–Jul.
Habitat: Dry, rocky soils.
Elevation: 1500–3000 m.
Distribution
Calif., Nev.
Discussion
Lupinus apertus is found in the northern High Sierra Nevada from Plumas to El Dorado counties in California and eastward to southwestern Washoe County, Nevada.
Lupinus apertus can be differentiated from L. andersonii by its abaxial banner pubescence and from L. angustiflorus by its pale yellow to orange-yellow flowers. Lupinus apertus is reportedly toxic.
Selected References
None.