Lathyrus graminifolius |
Lathyrus polyphyllus |
|
---|---|---|
grass-leaf pea |
leafy pea, leafy peavine, Oregon pea |
|
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, erect, sprawling, or climbing, basally branched 0–2 times, 4–8 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. |
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 | 5–8-flowered, 10–18 cm. |
8–12-flowered, 9–14 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. |
15–18 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 × 4–8 mm. |
40–70 × 4–9 mm. |
2n | = 14. |
= 14. |
Lathyrus graminifolius |
Lathyrus polyphyllus |
|
Phenology | Flowering Apr–Aug. | Flowering Apr–Jul. |
Habitat | Slopes of ponderosa pine, mixed conifer, spruce-fir and oak-juniper forests. | Openings in coniferous forests. |
Elevation | 1000–2800 m. (3300–9200 ft.) | 0–1800 m. (0–5900 ft.) |
Distribution |
AZ; NM; TX; Mexico (Chihuahua, Sonora)
|
CA; OR; WA
|
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 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. palustris var. graminifolius | |
Name authority | (S. Watson) T. G. White: Bull. Torrey Bot. Club 21: 454. (1894) | Nuttall in J. Torrey and A. Gray: Fl. N. Amer. 1: 274. (1838) |
Web links |