Lathyrus graminifolius |
Lathyrus eucosmus |
|
---|---|---|
grass-leaf pea |
bush vetchling, seemly pea |
|
Habit | Herbs perennial, from rhizome or woody rootstock, glabrous. | Herbs perennial, from rhizome, glabrous or puberulent. |
Stems | angled, sprawling or climbing, sometimes branched at flowering nodes, 2–6 dm. |
angled, erect, basally branched 0–2 times, 2–5 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. |
2–4 cm; tendrils simple or branched, sometimes prehensile; stipules linear, 5–15 × 1–2 mm, much smaller than leaflets; leaflets 6 or 8, scattered, blades ovate to lanceolate, 15–45 × 4–10 mm, surfaces glabrous throughout or puberulent abaxially. |
Inflorescences | 5–8-flowered, 10–18 cm. |
2–4-flowered, 7–12 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. |
18–20 mm; calyx lobes unequal, lateral lobes deltate, shorter than tube; corolla blue-purple, banner erect, blade longer than claw, wings equal to keel (held above keel); ovary glabrous. |
Legumes | 30–50 × 4–8 mm. |
40–50 × 8–10 mm, short-stipitate. |
2n | = 14. |
= 14. |
Lathyrus graminifolius |
Lathyrus eucosmus |
|
Phenology | Flowering Apr–Aug. | Flowering Apr–Jun. |
Habitat | Slopes of ponderosa pine, mixed conifer, spruce-fir and oak-juniper forests. | Dry soils in washes, pinyon-juniper woodlands, oak-brush, ponderosa pine forests, open prairies, grasslands. |
Elevation | 1000–2800 m. (3300–9200 ft.) | 1200–2500 m. (3900–8200 ft.) |
Distribution |
AZ; NM; TX; Mexico (Chihuahua, Sonora)
|
AZ; CO; NM; TX; UT; WY; Mexico (Coahuila)
|
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 eucosmus is known from the northern two-thirds of Arizona northward to southeastern Utah, and eastward in southeastern Wyoming, Colorado, New Mexico, and Texas to the edge of the Great Plains. (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 | L. brachycalyx subsp. eucosmus, L. brachycalyx var. eucosmus |
Name authority | (S. Watson) T. G. White: Bull. Torrey Bot. Club 21: 454. (1894) | Butters & H. St. John: Rhodora 19: 160. (1917) |
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