Lathyrus brachycalyx |
Lathyrus polyphyllus |
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Bonneville pea, Bonneville peavine, Bonneville vetchling, Rydberg's peavine |
leafy pea, leafy peavine, Oregon pea |
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Habit | Herbs perennial, from rhizome, glabrous or villous. | Herbs perennial, from rhizome, glabrous. | ||||
Stems | angled, erect, sprawling, or climbing, basally branched 0–3 times, 1–5 dm. |
angled, erect, sprawling, or climbing, basally branched 0–2 times, 4–8 dm. |
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Leaves | 2–9 cm; tendrils usually well developed, sometimes reduced to a single bristle; stipules lanceolate, 5–12 × 1–3 mm, much smaller than leaflets; leaflets 6–12, scattered, blades elliptic to narrowly so, 8–70 × 3–8 mm, surfaces glabrous or villous. |
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. |
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Inflorescences | 2–5-flowered, 5–15 cm. |
8–12-flowered, 9–14 cm. |
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Flowers | 13–20 mm; calyx lobes unequal, lateral lobes deltate, shorter than tube; corolla pinkish to deep blue-purple, banner erect, blade nearly 2 times as long as claw, wings equal to keel; ovary glabrous. |
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. |
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Legumes | 30–40 × 6–8 mm. |
40–70 × 4–9 mm. |
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2n | = 14. |
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Lathyrus brachycalyx |
Lathyrus polyphyllus |
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Phenology | Flowering Apr–Jul. | |||||
Habitat | Openings in coniferous forests. | |||||
Elevation | 0–1800 m. (0–5900 ft.) | |||||
Distribution |
w United States
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CA; OR; WA
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Discussion | Varieties 2 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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.) |
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Key |
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Source | FNA vol. 11. | FNA vol. 11. | ||||
Parent taxa | Fabaceae > subfam. Faboideae > Lathyrus | Fabaceae > subfam. Faboideae > Lathyrus | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Name authority | Rydberg: Bull. Torrey Bot. Club 34: 425. (1907) | Nuttall in J. Torrey and A. Gray: Fl. N. Amer. 1: 274. (1838) | ||||
Web links |