Lathyrus graminifolius |
Lathyrus hirsutus |
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grass-leaf pea |
Caley pea, hairy vetch, rough pea, singletary pea |
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Habit | Herbs perennial, from rhizome or woody rootstock, glabrous. | Herbs annual, glabrous, except legumes. |
Stems | angled, sprawling or climbing, sometimes branched at flowering nodes, 2–6 dm. |
winged, sprawling, basally branched 0–several times, 2–10 dm. |
Leaves | 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. |
0.8–3 cm, rachises narrowly winged; tendrils well developed; stipules linear, 5–10 × 1–3 mm, much smaller than leaflets; leaflets 2, blades lanceolate to linear, 25–75 × 5–12 mm, surfaces glabrous. |
Inflorescences | 5–8-flowered, 10–18 cm. |
1- or 2-flowered, 4–15 cm. |
Flowers | 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. |
8–10 mm; calyx lobes subequal, lateral lobes linear-triangular, longer than tube; corolla blue to red, banner erect, blade 2 times as long as claw, wings equal to keel; ovary densely pustulose-based pubescent, style rotated 90° from ovary axis. |
Legumes | 30–50 × 4–8 mm. |
25–40 × 5–10 mm. |
2n | = 14. |
= 14. |
Lathyrus graminifolius |
Lathyrus hirsutus |
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Phenology | Flowering Apr–Aug. | Flowering Apr–Jul. |
Habitat | Slopes of ponderosa pine, mixed conifer, spruce-fir and oak-juniper forests. | Roadsides, pastures, railroad rights-of-way, disturbed areas. |
Elevation | 1000–2800 m. (3300–9200 ft.) | 0–1500 m. (0–4900 ft.) |
Distribution |
AZ; NM; TX; Mexico (Chihuahua, Sonora)
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AL; AR; CA; FL; GA; IL; IN; KY; LA; MD; MI; MO; MS; NC; NM; OK; OR; SC; TN; TX; VA; Europe [Introduced in North America; introduced also in South America (Argentina, Chile, Uruguay), n, e Africa]
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Discussion | 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.) |
Lathyrus hirsutus is cultivated as a forage crop. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 11. | FNA vol. 11. |
Parent taxa | Fabaceae > subfam. Faboideae > Lathyrus | Fabaceae > subfam. Faboideae > Lathyrus |
Sibling taxa | ||
Synonyms | L. palustris var. graminifolius | |
Name authority | (S. Watson) T. G. White: Bull. Torrey Bot. Club 21: 454. (1894) | Linnaeus: Sp. Pl. 2: 732. (1753) |
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