Lupinus peirsonii

Herbs, perennial, 3–6 dm, silver-silky. Cotyledons deciduous, petiolate. Stems erect, branched from just above ground. Leaves cauline, clustered at base, ± fleshy; stipules 15–20 mm; petiole 2–15 cm; leaflets 5–8, blades widely oblanceolate, 25–70 × 10–30 mm, surfaces silver-silky. Peduncles 1–2.5 cm; bracts deciduous, 5–7 mm. Racemes 1–1.5 cm; flowers ± whorled. Pedicels 1–2 mm. Flowers 10–12 mm; calyx bulge or spur 0–1 mm, abaxial lobe entire, 5–7 mm, adaxial lobe obscurely 2-toothed, 4–6 mm; corolla yellow, banner usually hairy abaxially, lower keel margins glabrous, adaxial margin ciliate middle to tip. Legumes 3–4 cm, silky. Seeds 3–5.

Phenology: Flowering Apr–Jun.
Habitat: Gravelly or rocky areas, Joshua tree woodland, montane coniferous forests, pinyon and juniper woodlands.
Elevation: 1000–2500 m.

Calif.

Discussion

Lupinus peirsonii is known only from the San Gabriel Mountains in Los Angeles County.

Selected References

None.

Lower Taxa