Lathyrus delnorticus
Revis. N. Amer. Lathyrus, 30, fig. 21. 1952.
Herbs perennial, from rhizome, glabrous. Stems narrowly winged, erect to climbing, basally branched 0–several times, 2–8 dm. Leaves 9–13 cm; tendrils well developed; stipules lanceolate, 10–30 × 3–15 mm, sometimes equal to distal leaflets; leaflets 9–12, scattered, blades lanceolate, 30–50 × 5–15 mm, surfaces glabrous. Inflorescences 8–12-flowered, 7–10 cm. Flowers 9–12 mm; calyx lobes unequal, lateral lobes deltate, shorter than tube; corolla cream-white, banner erect, blade longer than claw, wings equal to keel; ovary glabrous. Legumes 30–40 × 3–5 mm. 2n = 14.
Phenology: Flowering May–Jun.
Habitat: Serpentine areas along rivers and creeks in coniferous and mixed evergreen forests.
Elevation: 0–1000 m.
Distribution
Calif., Oreg.
Discussion
Lathyrus delnorticus is restricted to Del Norte and western Siskiyou counties in California, and Curry and Josephine counties in Oregon.
Selected References
None.