Herbs, annual, 2–5 dm, pubes­cent. Cotyledons deciduous, petiolate. Stems ascending or erect, branched or unbranched. Leaves cauline; petiole 3–10 cm; leaflets 5–8, blades 20–50 × 4–11 mm, adaxial surface pubescent. Pedun­cles 5–18 cm; bracts deciduous, 5–7.5 mm. Racemes 10–40 cm; flowers whorled. Pedicels 3–6 mm. Flowers 8–12 mm; calyx 5–7 mm, lobes ± equal, entire; corolla blue, banner spot white, upper keel margins with a tooth near middle, ciliate from tooth to near apex, banner width equal to or greater than length. Legumes 3–5 cm, coarsely pubescent. Seeds 5–8.

Phenology: Flowering late winter–spring.
Habitat: Uncommon in open areas.
Elevation: 0–800 m.

Distribution

• Generated Map
• Legacy Map

Calif., Oreg.

Discussion

Lupinus affinis is mostly a coastal species that occurs from the San Francisco Bay region northward to Lane County, Oregon.

Lupinus affinis intergrades with L. nanus and can be confused with L. littoralis var. variicolor, a perennial species with a toothed keel.

Selected References

None.

Lower Taxa

None.