Lathyrus laetivirens |
Lathyrus polyphyllus |
|
---|---|---|
aspen pea, aspen peavine, aspen vetchling, plateau peavine, plateau vetchling |
leafy pea, leafy peavine, Oregon pea |
|
Habit | Herbs perennial, from rhizome, glabrous. | Herbs perennial, from rhizome, glabrous. |
Stems | angled, sprawling to erect, basally branched 0–3 times, 2–8 dm. |
angled, erect, sprawling, or climbing, basally branched 0–2 times, 4–8 dm. |
Leaves | 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. |
11–16 cm; tendrils well developed; stipules ovate to lanceolate, 20–30 × 10–30 mm, nearly equal to distal leaflets; leaflets 10–16, scattered, blades ovate to lanceolate, 30–50 × 10–30 mm, surfaces glabrous. |
Inflorescences | 2–5-flowered, 4–7 cm. |
8–12-flowered, 9–14 cm. |
Flowers | 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. |
15–18 mm; calyx lobes unequal, lateral lobes linear-triangular, equal to or longer than tube; corolla blue-purple, banner erect, blade longer than claw, wings equal to keel; ovary glabrous. |
Legumes | 30–50 × 5–15 mm. |
40–70 × 4–9 mm. |
2n | = 14. |
|
Lathyrus laetivirens |
Lathyrus polyphyllus |
|
Phenology | Flowering Apr–Jul. | Flowering Apr–Jul. |
Habitat | Flats, hillsides, sagebrush communities, pinyon-juniper, oak, pine, aspen and Douglas-fir forests. | Openings in coniferous forests. |
Elevation | 1200–3200 m. (3900–10500 ft.) | 0–1800 m. (0–5900 ft.) |
Distribution |
AZ; CO; NM; NV; UT
|
CA; OR; WA
|
Discussion | 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.) |
Lathyrus polyphyllus is known from in and west of the Cascade Range. Lathyrus ecirrhosus A. Heller (1904), not Philippi (1892), is an illegitimate name that pertains here. (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. lanszwertii var. laetivirens, L. leucanthus var. laetivirens | |
Name authority | Greene ex Rydberg: Fl. Colorado, 217. (1906) | Nuttall in J. Torrey and A. Gray: Fl. N. Amer. 1: 274. (1838) |
Web links |