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leafy pea, leafy peavine, Oregon pea

Habit Herbs perennial, from rhizome, glabrous.
Stems

angled, erect, sprawling, or climbing, basally branched 0–2 times, 4–8 dm.

Leaves

11–16 cm;

tendrils well developed;

stipules ovate to lanceolate, 20–30 × 10–30 mm, nearly equal to distal leaflets;

leaflets 10–16, scattered, blades ovate to lanceolate, 30–50 × 10–30 mm, surfaces glabrous.

Inflorescences

8–12-flowered, 9–14 cm.

Flowers

15–18 mm;

calyx lobes unequal, lateral lobes linear-triangular, equal to or longer than tube;

corolla blue-purple, banner erect, blade longer than claw, wings equal to keel;

ovary glabrous.

Legumes

40–70 × 4–9 mm.

2n

= 14.

Lathyrus polyphyllus

Phenology Flowering Apr–Jul.
Habitat Openings in coniferous forests.
Elevation 0–1800 m. (0–5900 ft.)
Distribution
from FNA
CA; OR; WA
[WildflowerSearch map]
[BONAP county map]
Discussion

Lathyrus polyphyllus is known from in and west of the Cascade Range. Lathyrus ecirrhosus A. Heller (1904), not Philippi (1892), is an illegitimate name that pertains here.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Source FNA vol. 11.
Parent taxa Fabaceae > subfam. Faboideae > Lathyrus
Sibling taxa
L. angulatus, L. aphaca, L. biflorus, L. brachycalyx, L. brownii, L. cicera, L. decaphyllus, L. delnorticus, L. eucosmus, L. glandulosus, L. graminifolius, L. grimesii, L. hirsutus, L. hitchcockianus, L. holochlorus, L. japonicus, L. jepsonii, L. laetivirens, L. lanszwertii, L. latifolius, L. littoralis, L. nevadensis, L. nissolia, L. ochroleucus, L. odoratus, L. palustris, L. pauciflorus, L. pratensis, L. pusillus, L. rigidus, L. sphaericus, L. splendens, L. sulphureus, L. sylvestris, L. tingitanus, L. torreyi, L. tracyi, L. tuberosus, L. venosus, L. vestitus
Name authority Nuttall in J. Torrey and A. Gray: Fl. N. Amer. 1: 274. (1838)
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