Lathyrus nevadensis |
Lathyrus tuberosus |
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purple peavine, Sierra Nevada pea, Sierra Nevada sweet pea, Sierra pea, Sierra peavine |
earth-nut pea, earth-nut peavine, tuber vetchling, tuberous pea, tuberous sweetpea |
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Habit | Herbs perennial, from rhizome, pubescent except glabrous on legumes and leaflets adaxially. | Herbs perennial, from tuber-bearing rhizome, glabrous. | ||||||||
Stems | angled, erect, sprawling, or climbing, basally branched 0–several times, 1–6 dm. |
not winged, sprawling, branched along trailing stems several times, 2–6 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. |
0.5–2 cm; tendrils well developed; stipules filiform-linear, 5–10 × 1–3 mm, much smaller than leaflets; leaflets 2, blades lanceolate, 10–40 × 5–15 mm, surfaces glabrous. |
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Inflorescences | 2–10-flowered, 3–15 cm. |
4–6-flowered, 6–15 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. |
8–12 mm; calyx lobes unequal, lateral lobes linear-triangular, equal to tube; corolla reddish, banner erect, blade longer than claw, wings equal to keel; ovary glabrous, style rotated 90° from ovary axis. |
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Legumes | 20–30(–45) × 5–10 mm. |
20–30(–40) × 3–6 mm. |
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2n | = 14. |
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Lathyrus nevadensis |
Lathyrus tuberosus |
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Phenology | Flowering Apr–Jun. | |||||||||
Habitat | Roadsides, meadows, fields. | |||||||||
Elevation | 50–100 m. (200–300 ft.) | |||||||||
Distribution |
w North America
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CT; IA; IL; IN; KY; MA; ME; MI; MN; MO; MT; NE; NH; NJ; NY; OH; PA; TN; VT; WA; WI; WV; MB; ON; QC; SK; Europe; w Asia [Introduced in North America; introduced also in Pacific Islands (New Zealand), Australia]
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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 | ||||||||||
Name authority | S. Watson: Proc. Amer. Acad. Arts 11: 133. (1876) | Linnaeus: Sp. Pl. 2: 732. (1753) | ||||||||
Web links |