Herbs, annual, 2–7 dm, with short-appressed and long, spreading hairs. Cotyledons deciduous, petiolate. Stems erect, usually branched, sometimes unbranched. Leaves cau­line; petiole 3–12 cm; leaflets 7–10, blades 20–50 × 1.5–3.5 mm, adaxial surface glabrous. Peduncles 4–7 cm; bracts deciduous, 10–15 mm, longer than buds. Racemes 10–40 cm; flowers spirally arranged, some­times appearing ± whorled proximally. Pedicels 5–9 mm. Flowers 10–18 mm; calyx 5–6.5 mm, lobes ± equal, abaxial lobe entire, adaxial lobe deeply cleft; corolla bright blue, banner spot whitish, becoming magenta, lower keel margins ciliate near claw. Legumes 3 cm, coarsely pubescent. Seeds 5–8.

Phenology: Flowering spring.
Habitat: Rocky slopes, open areas.
Elevation: 0–1500 m.

Distribution

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Calif.

Discussion

Lupinus benthamii occurs in the Sierra Nevada Foothills, Tehachapi Mountains, South Coastal Ranges, and parts of the delta region of the Great Central Valley.

Selected References

None.

Lower Taxa

None.