aka Leather-root

from Jepson:

Stem prostrate to decumbent, sometimes faintly striate; erect parts < 6.5 cm
Leaf: stipule 4.5–10 mm; petiole 12–75 mm; leaflet 3–11 cm, obovate to round, both surfaces brown-glandular, hairy or not
Inflorescence 6–35 cm; bract 7–27 mm
Flower 12–23 mm; calyx 15–19 mm; banner 10–16 mm
Fruit 6–9 mm, brown; veins obvious
Seed 4–5 mm
Ecology: Meadows, streamsides, moist hillsides
Elevation: < 2250 m.
Bioregional distribution: California Floristic Province (except Great Central Valley)
Synonyms: Psoralea o. Lindl