Lathyrus nevadensis
Lathyrus brownii
purple peavine, Sierra Nevada pea, Sierra Nevada sweet pea, Sierra pea, Sierra peavine
Brown's brush pea, Brown's pea, Brown's sweet pea
angled, erect, sprawling, or climbing, basally branched 0–several times, 1–6 dm.
angled, sprawling, basally branched 0–3 times, 2–5 dm.
2–10 cm;
tendrils mucronate (less than 1 cm) to well developed;
stipules linear, 5–25 × 1–8 mm, much smaller than leaflets;
leaflets 4–12, usually scattered, blades broadly ovate to lanceolate or linear, (17–)20–110 × 2–30(–37) mm, surfaces usually glabrous, rarely finely pubescent.
4–6 cm;
tendrils well developed;
stipules linear, 5–15 × 1–5 mm, much smaller than leaflets;
leaflets 6–10, scattered, blades ovate to linear, 15–40 × 1–10 mm, surfaces glabrous.
2–10-flowered, 3–15 cm.
2–4-flowered, 3–4 cm.
12–22 mm;
calyx lobes unequal, lateral lobes deltate, usually shorter than tube;
corolla blue-purple to pink-purple or white, banner erect, blade longer than claw, wings equal to keel;
ovary glabrous.
12–16 mm;
calyx lobes unequal, lateral lobes deltate, shorter than tube;
corolla purple, banner erect, blade longer than claw, wings longer than keel (by 1–3 mm);
ovary glabrous.
20–30(–45) × 5–10 mm.
30–40 × 5–8 mm.
Lathyrus nevadensis
Lathyrus brownii
Varieties 3 (3 in the flora).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Lathyrus brownii has been variously allied with L. pauciflorus (C. L. Hitchcock 1952) or with L. lanszwertii (R. C. Barneby 1989). It is distinct from L. pauciflorus by its smaller leaflets and flowers and by its range (northeastern California and adjacent Nevada and Oregon versus Colorado and Utah to Idaho, northeastern Oregon, and eastern Washington), and from L. lanszwertii by its larger flowers, smaller leaflets, general absence of pubescence, and its more typical prostrate, sprawling habit.
C. L. Hitchcock (1952) considered Lathyrus schaffneri Rydberg as described by L. Abrams and R. S. Ferris (1923–1960, vol. 2) to be referable to L. brownii.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
1. Corollas blue-purple to pink-purple; British Columbia, California, w Oregon, w, c Washington. | var. nevadensis |
1. Corollas white; ne Oregon, e Washington, adjacent Idaho. | → 2 |
2. Leaves 4–10 cm; leaflets 6–10; tendrils well developed; flowers 5–10, 12–18 mm. | var. parkeri |
2. Leaves 2–5 cm; leaflets 4 or 6; tendrils reduced to bristles, (usually less than 1 cm); flowers 2–4, 18–22 mm. | var. cusickii |
BC
OR
WA
Flora NW
PNW Herbaria
WildflowerSearch
iNaturalist
USDA Plants Database
CA
