Lathyrus lanszwertii |
Lathyrus sulphureus |
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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 |
Brewer's sweet or snub or sulfur pea, Brewer's sweet pea, snub pea, sulfur pea, sulpher pea, sulphur pea |
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Habit | Herbs perennial, from rhizome, glabrous or sparsely pubescent. | Herbs perennial, from rhizome, usually glabrous, rarely pubescent. | ||||||||||||||||||||
Stems | angled, erect, sprawling, or climbing, basally branched 0–4 times, 1–8 dm. |
angled, climbing, basally branched 0–3 times, 5–15 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. |
9–12 cm; tendrils well developed; stipules lanceolate, 15–25 × 4–10 mm, sometimes equal to distal leaflets; leaflets 6–12, scattered, blades ovate to lanceolate, 25–50 × 10–20 mm, surfaces glabrous or pubescent. |
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Inflorescences | 2–6-flowered, 2–10 cm. |
9–15-flowered, 6–10 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. |
11–13 mm; calyx lobes unequal, lateral lobes deltate to lanceolate, shorter than tube; corolla orange to yellow-cream, banner erect, blade shorter than claw, wings equal to keel; ovary glabrous. |
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Legumes | 25–45 × 6–10 mm. |
40–70 × 4–6 mm. |
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Lathyrus lanszwertii |
Lathyrus sulphureus |
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Distribution |
w North America
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w United States
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Discussion | Varieties 5 (5 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Varieties 2 (2 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 | ||||||||||||||||||||||
Name authority | Kellogg: Proc. Calif. Acad. Sci. 2: 150, fig. 44. (1863) | W. H. Brewer ex A. Gray: Proc. Amer. Acad. Arts 7: 399. (1868) | ||||||||||||||||||||
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