Lathyrus eucosmus
Lathyrus brownii
bush vetchling, seemly pea
Brown's brush pea, Brown's pea, Brown's sweet pea
angled, erect, basally branched 0–2 times, 2–5 dm.
angled, sprawling, basally branched 0–3 times, 2–5 dm.
2–4 cm;
tendrils simple or branched, sometimes prehensile;
stipules linear, 5–15 × 1–2 mm, much smaller than leaflets;
leaflets 6 or 8, scattered, blades ovate to lanceolate, 15–45 × 4–10 mm, surfaces glabrous throughout or puberulent abaxially.
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.
2–4-flowered, 7–12 cm.
2–4-flowered, 3–4 cm.
18–20 mm;
calyx lobes unequal, lateral lobes deltate, shorter than tube;
corolla blue-purple, banner erect, blade longer than claw, wings equal to keel (held above 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.
40–50 × 8–10 mm, short-stipitate.
30–40 × 5–8 mm.
= 14.
Lathyrus eucosmus
Lathyrus brownii
Lathyrus eucosmus is known from the northern two-thirds of Arizona northward to southeastern Utah, and eastward in southeastern Wyoming, Colorado, New Mexico, and Texas to the edge of the Great Plains.
(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.)
WildflowerSearch
iNaturalist
USDA Plants Database
CA
OR
Flora NW
PNW Herbaria
