Lathyrus vestitus |
Lathyrus pusillus |
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canyon pea, common Pacific pea, Pacific pea, Pacific peavine, Pacific vetchling, wild sweetpea |
singletary vetchling, tiny pea |
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Habit | Herbs perennial, from rhizome, glabrous or sparsely to densely pubescent. | Herbs annual, glabrate. | ||||||||
Stems | angled to narrowly winged, sprawling or climbing, basally branched 0–4 times, 2–20 dm. |
narrowly winged, sprawling or climbing, basally branched 0–4 times, 3–6 dm. |
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Leaves | 4–14 cm; tendrils well developed; stipules lanceolate to linear, 5–25 × 1–10 mm, much smaller than leaflets (more than 1/4 width of distal leaflets); leaflets 6–12, scattered, blades ovate to linear, 12–50 × 5–25 mm, surfaces glabrous or pubescent. |
1–3 cm; tendrils well developed; stipules linear, 10–20 × 2–5 mm, equal to smaller leaflets; leaflets 2, blades linear, 15–60 × 2–8 mm, surfaces glabrous. |
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Inflorescences | 5–20-flowered, 5–25 cm. |
terminal, 1- or 2-flowered, 2–4 cm. |
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Flowers | 12–25 mm; calyx lobes unequal, lateral lobes deltate, linear-triangular, or lanceolate and wider distal to base, shorter to longer than tube; corolla cream-white, rose, lavender, blue-purple, or deep wine red, banner erect or reflexed toward calyx tube, blade equal to or longer than claw, wings equal to keel; ovary glabrous or pubescent. |
7–10 mm; calyx lobes subequal, linear-triangular, usually longer than tube; corolla blue, banner erect, blade equal to claw, wings equal to keel; ovary glabrous. |
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Legumes | 40–60 × 4–7 mm. |
30–50 × 2–4 mm. |
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2n | = 14. |
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Lathyrus vestitus |
Lathyrus pusillus |
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Phenology | Flowering Mar–May. | |||||||||
Habitat | Roadsides, pastures, prairies, open habitats. | |||||||||
Elevation | 0–800 m. (0–2600 ft.) | |||||||||
Distribution |
w United States; nw Mexico
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AL; AR; FL; KS; LA; MO; MS; NC; OK; TX; VA; South America (Argentina, Brazil, Chile, Ecuador, Paraguay, Peru, Uruguay) |
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Discussion | Varieties 3 (3 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Lathyrus pusillus, the only North American member of section Notolathyrus, a section centered in South America, is also the only annual species of Lathyrus native to North America. It is native to the southeastern United States; it has been cultivated as a forage crop in Oregon and occasionally escapes, but it has not become naturalized there. (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 | Nuttall in J. Torrey and A. Gray: Fl. N. Amer. 1: 276. (1838) | Elliott: Sketch Bot. S. Carolina 2: 223. (1823) | ||||||||
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