Herbage usually loosely strig­ulose in variable amounts, hairs appressed or narrowly ascending, straight or sub­sin­uous, 0.4–0.6(–0.7) mm. Stems low, diffuse, 10–30(–40) cm. Leaves 3–9 cm; leaflets 9–17(or 19), blades 4–18(–21) mm. Racemes 4–16-flowered; axis (2–)3–7 cm in fruit. Flowers: calyx 4.6–5.6(–6) mm, tube 3.8–4.7 mm, lobes 0.5–1.5(–1.7) mm; corolla ochroleucous, immaculate; banner 9.5–13.5 mm. Legumes (15–)25–60(–75) × 10–25(–35) mm, glabrous; stipe 3–6 mm. Seeds (13–)15–22.

Phenology: Flowering Jun–Aug.
Habitat: Rocky slopes, ridge crests, usu­ally in pine forests but ascending into fir forests, on igneous or metamorphic bedrock, common on serpen­tine.
Elevation: (700–)1200–2700 m.

Distribution

• Generated Map
• Legacy Map

Calif., Oreg.

Discussion

The transparent fruits of var. siskiyouensis, with ovules readily apparent through the walls, are the largest for the species. Variety siskiyouensis occurs in northern Coastal Ranges in California and southwestern Oregon, passing in the Klamath Basin into var. confusus.

Selected References

None.

Lower Taxa

None.