Lathyrus brachycalyx |
Lathyrus sphaericus |
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Bonneville pea, Bonneville peavine, Bonneville vetchling, Rydberg's peavine |
grass pea, grass peavine |
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Habit | Herbs perennial, from rhizome, glabrous or villous. | Herbs annual, glabrous. | ||||
Stems | angled, erect, sprawling, or climbing, basally branched 0–3 times, 1–5 dm. |
not winged, erect, sprawling or climbing, basally branched 1–several times, 2–5 dm. |
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Leaves | 2–9 cm; tendrils usually well developed, sometimes reduced to a single bristle; stipules lanceolate, 5–12 × 1–3 mm, much smaller than leaflets; leaflets 6–12, scattered, blades elliptic to narrowly so, 8–70 × 3–8 mm, surfaces glabrous or villous. |
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 | 2–5-flowered, 5–15 cm. |
1-flowered, 1–2 cm, prolonged beyond flower into a bristle. |
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Flowers | 13–20 mm; calyx lobes unequal, lateral lobes deltate, shorter than tube; corolla pinkish to deep blue-purple, banner erect, blade nearly 2 times as long as claw, wings equal to keel; ovary glabrous. |
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 | 30–40 × 6–8 mm. |
40–60 × 4–6 mm, longitudinal venation prominent. |
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2n | = 14. |
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Lathyrus brachycalyx |
Lathyrus sphaericus |
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Phenology | Flowering Apr–Jul. | |||||
Habitat | Roadsides, pastures, waste areas. | |||||
Elevation | 0–500 m. (0–1600 ft.) | |||||
Distribution |
w United States
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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 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 | Rydberg: Bull. Torrey Bot. Club 34: 425. (1907) | Retzius: Observ. Bot. 3: 39. (1783) | ||||
Web links |
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