Lathyrus graminifolius |
Lathyrus holochlorus |
|
---|---|---|
grass-leaf pea |
thin-leaf pea, thin-leaf 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 to narrowly winged, sprawling, often branched mid stem (at or just proximal to flowering nodes), 3–10 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. |
6–10 cm; tendrils well developed; stipules lanceolate to linear, 10–20 × 1–8 mm, much smaller than leaflets; leaflets 8–12, usually paired, sometimes scattered, ovate to lanceolate, 20–45 × 15–25 mm, glabrous. |
Inflorescences | 5–8-flowered, 10–18 cm. |
7–15-flowered, 5–15 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. |
12–14 mm; calyx lobes unequal, lateral lobes linear-triangular, shorter than or equal to tube; corolla cream-white, 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 holochlorus |
|
Phenology | Flowering Apr–Aug. | Flowering Apr–Jun. |
Habitat | Slopes of ponderosa pine, mixed conifer, spruce-fir and oak-juniper forests. | Roadside fencerows, stream banks, grasslands, open oak woodlands. |
Elevation | 1000–2800 m. (3300–9200 ft.) | 50–500 m. (200–1600 ft.) |
Distribution |
AZ; NM; TX; Mexico (Chihuahua, Sonora)
|
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 holochlorus is restricted to the Willamette Valley of western Oregon and at least one site in southwestern Washington. (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. ochropetalus subsp. holochlorus |
Name authority | (S. Watson) T. G. White: Bull. Torrey Bot. Club 21: 454. (1894) | (Piper) C. L. Hitchcock: Revis. N. Amer. Lathyrus, 31. (1952) |
Web links |