Herbs, annual, 2–6 dm, sparsely pubescent. Cotyledons deciduous, petiolate. Stems erect, usually branched, some­times unbranched. Leaves cau­line; petiole 3–7 cm; leaflets 7–9, blades 20–50 × 3–5 mm, adaxial surface sparsely pubescent. Peduncles 5–8 cm; bracts deciduous, 8–10 mm. Racemes 10–25 cm; flowers usually whorled, sometimes spirally arranged. Pedicels 4–5 mm. Flowers 10–12 mm; calyx 6–10 mm, lobes ± equal, abaxial lobe entire, adaxial lobe deeply cleft; corolla blue, banner spot white, upper keel margins with few cilia near apex, banner as wide as long or wider. Legumes 3–6 × 0.8–1 cm, densely pubescent. Seeds 6–8.

Phenology: Flowering spring.
Habitat: Sandy or gravelly areas.
Elevation: 0–500 m.

Distribution

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Calif., Mexico (Baja California).

Discussion

Lupinus guadalupensis is known from San Clemente Island in California and Guadalupe Island in Mexico. It intergrades with L. nanus.

Selected References

None.

Lower Taxa

None.