Lathyrus vestitus |
Lathyrus graminifolius |
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canyon pea, common Pacific pea, Pacific pea, Pacific peavine, Pacific vetchling, wild sweetpea |
grass-leaf pea |
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Habit | Herbs perennial, from rhizome, glabrous or sparsely to densely pubescent. | Herbs perennial, from rhizome or woody rootstock, glabrous. | ||||||||
Stems | angled to narrowly winged, sprawling or climbing, basally branched 0–4 times, 2–20 dm. |
angled, sprawling or climbing, sometimes branched at flowering nodes, 2–6 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. |
5–9 cm; tendrils usually well developed; stipules lanceolate to linear, 8–12 × 1–5 mm, much smaller than leaflets; leaflets 4–8, scattered, blades usually linear, rarely lanceolate, 30–80 × 1–20 mm, surfaces glabrous. |
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Inflorescences | 5–20-flowered, 5–25 cm. |
5–8-flowered, 10–18 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. |
8–15 mm; calyx lobes subequal, lateral lobes deltate, shorter than tube; corolla white to blue-orchid, banner erect, blade equal to claw, wings equal to keel; ovary glabrous. |
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Legumes | 40–60 × 4–7 mm. |
30–50 × 4–8 mm. |
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2n | = 14. |
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Lathyrus vestitus |
Lathyrus graminifolius |
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Phenology | Flowering Apr–Aug. | |||||||||
Habitat | Slopes of ponderosa pine, mixed conifer, spruce-fir and oak-juniper forests. | |||||||||
Elevation | 1000–2800 m. (3300–9200 ft.) | |||||||||
Distribution |
w United States; nw Mexico
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AZ; NM; TX; Mexico (Chihuahua, Sonora)
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Discussion | Varieties 3 (3 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Lathyrus graminifolius is known from the eastern half of Arizona to the western two-thirds of New Mexico and in trans-Pecos Texas. (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 | ||||||||||
Synonyms | L. palustris var. graminifolius | |||||||||
Name authority | Nuttall in J. Torrey and A. Gray: Fl. N. Amer. 1: 276. (1838) | (S. Watson) T. G. White: Bull. Torrey Bot. Club 21: 454. (1894) | ||||||||
Web links |
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