Lathyrus nevadensis |
Lathyrus rigidus |
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purple peavine, Sierra Nevada pea, Sierra Nevada sweet pea, Sierra pea, Sierra peavine |
bushy pea, Modoc pea, rigid pea, stiff pea, stiff peavine |
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Habit | Herbs perennial, from rhizome, pubescent except glabrous on legumes and leaflets adaxially. | Herbs perennial, from rootstock, glabrous. | ||||||||
Stems | angled, erect, sprawling, or climbing, basally branched 0–several times, 1–6 dm. |
angled, erect, basally branched 5–10 times, 1–3 dm. |
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Leaves | 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. |
1–3 cm; tendrils bristlelike, less than 1 cm; stipules lanceolate, 10–15 × 1–8 mm, equal to distal leaflets; leaflets 4–8, paired, blades lanceolate, 15–30 × 5–10 mm, surfaces glabrous. |
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Inflorescences | 2–10-flowered, 3–15 cm. |
2- or 3-flowered, 4–9 cm. |
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Flowers | 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. |
12–18 mm; calyx lobes ± unequal, lateral lobes deltate, shorter than tube; corolla white to lilac, banner erect, blade longer than claw, wings longer than keel; ovary glabrous. |
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Legumes | 20–30(–45) × 5–10 mm. |
20–40 × 5–10 mm, stipitate. |
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2n | = 14. |
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Lathyrus nevadensis |
Lathyrus rigidus |
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Phenology | Flowering Apr–Jun. | |||||||||
Habitat | Basalt scablands with sagebrush. | |||||||||
Elevation | 800–1700 m. (2600–5600 ft.) | |||||||||
Distribution |
w North America
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CA; ID; NV; OR
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Discussion | Varieties 3 (3 in the flora). (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 | ||||||||||
Synonyms | L. albus | |||||||||
Name authority | S. Watson: Proc. Amer. Acad. Arts 11: 133. (1876) | T. G. White: Bull. Torrey Bot. Club 21: 455. (1894) | ||||||||
Web links |