Lathyrus venosus |
Lathyrus sphaericus |
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bushy vetchling, veiny pea, veiny peavine |
grass pea, grass peavine |
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Habit | Herbs perennial, from rhizome, glabrous or pubescent. | Herbs annual, glabrous. | ||||||||
Stems | angled, sprawling or climbing, basally branched 0–3 times, 4–10 dm. |
not winged, erect, sprawling or climbing, basally branched 1–several times, 2–5 dm. |
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Leaves | 6–18 cm; tendrils well developed; stipules lanceolate to linear, 10–20 × 2–10 mm, much smaller than distal leaflets (less than 1/4 width of distal leaflets); leaflets 8–14, scattered, blades ovate to lanceolate, 25–70 × 10–35 mm, surfaces glabrous or pubescent. |
0.5–1.5 cm; tendrils bristlelike to 4 cm, often unbranched; stipules linear, 10–15 × 2–10 mm, much smaller than leaflets; leaflets 2, blades linear, 20–90 × 2–10 mm, surfaces glabrous. |
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Inflorescences | 5–20-flowered, 6–20 cm. |
1-flowered, 1–2 cm, prolonged beyond flower into a bristle. |
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Flowers | 10–15 mm; calyx lobes unequal, lateral lobes linear-triangular or lanceolate, shorter to longer than tube; corolla blue-purple to rose, banner erect, blade equal to claw, wings equal to keel; ovary glabrous or pubescent. |
6–10 mm; calyx lobes subequal, lateral lobes lanceolate, longer than tube; corolla reddish orange, banner erect, blade longer than or equal to claw, wings equal to keel; ovary glabrous. |
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Legumes | 20–50 × 3–7 mm. |
40–60 × 4–6 mm, longitudinal venation prominent. |
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2n | = 14. |
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Lathyrus venosus |
Lathyrus sphaericus |
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Phenology | Flowering Apr–Jul. | |||||||||
Habitat | Roadsides, pastures, waste areas. | |||||||||
Elevation | 0–500 m. (0–1600 ft.) | |||||||||
Distribution |
North America
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CA; OR; WA; BC; Europe [Introduced in North America; introduced also in Mexico, Asia, 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 | Muhlenberg ex Willdenow: Sp. Pl. 3: 1092. (1802) | Retzius: Observ. Bot. 3: 39. (1783) | ||||||||
Web links |
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