Lathyrus lanszwertii |
Lathyrus torreyi |
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aspen peavine, lanszwert's pea, lanszwert's vetchling, Nevada pea, Nevada peavine, Nevada sweet pea, pinewood peavine, Rocky Mountain sweetpea, thick-leaf pea, thick-leaf peavine |
redwood pea, Torrey's pea, Torrey's peavine |
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Habit | Herbs perennial, from rhizome, glabrous or sparsely pubescent. | Herbs perennial, from rhizome, finely villous. | ||||||||||||||||
Stems | angled, erect, sprawling, or climbing, basally branched 0–4 times, 1–8 dm. |
angled, erect to sprawling, basally branched 0–3 times, 1–4 dm. |
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Leaves | (0.5–)1–8 cm; tendrils mucronate to well developed; stipules linear to lanceolate, 5–25 × 1–6 mm, much smaller than leaflets; leaflets 2–10, scattered, blades lanceolate or linear, 20–70 × 2–20 mm, surfaces glabrous or sparsely pubescent. |
2–7 cm; tendrils absent or mucronate; stipules lanceolate, 7–12 × 2–5 mm, much smaller than leaflets; leaflets 8–16, scattered, blades ovate to lanceolate, 5–15 × 3–10 mm, surfaces villous. |
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Inflorescences | 2–6-flowered, 2–10 cm. |
1- or 2-flowered, 0.5–3 cm. |
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Flowers | 7–15 mm; calyx lobes unequal, lateral lobes deltate, shorter than tube; corolla white or blue-purple, banner erect, blade equal to claw, wings equal to keel; ovary glabrous. |
8–12 mm; calyx lobes unequal, lateral lobes linear-triangular, longer than tube; corolla blue-purple, banner erect, blade equal to claw, wings longer than keel; ovary densely pubescent. |
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Legumes | 25–45 × 6–10 mm. |
15–20 × 4–5 mm. |
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2n | = 14. |
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Lathyrus lanszwertii |
Lathyrus torreyi |
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Phenology | Flowering Apr–Jul. | |||||||||||||||||
Habitat | Open coniferous forests. | |||||||||||||||||
Elevation | 50–1500 m. (200–4900 ft.) | |||||||||||||||||
Distribution |
w North America
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CA; OR; WA
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Discussion | Varieties 5 (5 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Lathyrus torreyi is known from in and west of the Cascade Range; it is very rare in Washington. (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 | Kellogg: Proc. Calif. Acad. Sci. 2: 150, fig. 44. (1863) | A. Gray: Proc. Amer. Acad. Arts 7: 337. (1868) | ||||||||||||||||
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