Lathyrus graminifolius |
Lathyrus laetivirens |
|
---|---|---|
grass-leaf pea |
aspen pea, aspen peavine, aspen vetchling, plateau peavine, plateau vetchling |
|
Habit | Herbs perennial, from rhizome or woody rootstock, glabrous. | Herbs perennial, from rhizome, glabrous. |
Stems | angled, sprawling or climbing, sometimes branched at flowering nodes, 2–6 dm. |
angled, sprawling to erect, basally branched 0–3 times, 2–8 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. |
3–8 cm; tendrils well developed, often branched; stipules lanceolate, 8–12 × 2–5 mm, much smaller than leaflets; leaflets 6–10, usually paired, blades ovate, 20–40 × 10–20 mm, surfaces glabrous. |
Inflorescences | 5–8-flowered, 10–18 cm. |
2–5-flowered, 4–7 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. |
15–20 mm; calyx lobes unequal, lateral lobes deltate, shorter than tube; corolla white to slightly pink or lavender, banner erect, blade longer than claw, wings equal to keel; ovary glabrous. |
Legumes | 30–50 × 4–8 mm. |
30–50 × 5–15 mm. |
2n | = 14. |
|
Lathyrus graminifolius |
Lathyrus laetivirens |
|
Phenology | Flowering Apr–Aug. | Flowering Apr–Jul. |
Habitat | Slopes of ponderosa pine, mixed conifer, spruce-fir and oak-juniper forests. | Flats, hillsides, sagebrush communities, pinyon-juniper, oak, pine, aspen and Douglas-fir forests. |
Elevation | 1000–2800 m. (3300–9200 ft.) | 1200–3200 m. (3900–10500 ft.) |
Distribution |
AZ; NM; TX; Mexico (Chihuahua, Sonora)
|
AZ; CO; NM; NV; UT
|
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.) |
C. L. Hitchcock (1952), S. L. Welsh et al. (1987), and D. Isely (1998) placed Lathyrus laetivirens within the L. lanszwertii complex, whereas R. C. Barneby (1989) treated it as a separate species. (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. lanszwertii var. laetivirens, L. leucanthus var. laetivirens |
Name authority | (S. Watson) T. G. White: Bull. Torrey Bot. Club 21: 454. (1894) | Greene ex Rydberg: Fl. Colorado, 217. (1906) |
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