Lathyrus eucosmus |
Lathyrus aphaca |
|
---|---|---|
bush vetchling, seemly pea |
yellow pea, yellow vetchling |
|
Habit | Herbs perennial, from rhizome, glabrous or puberulent. | Herbs annual, glabrous. |
Stems | angled, erect, basally branched 0–2 times, 2–5 dm. |
not winged, erect or climbing, basally branched 1–several times, 2–6 dm. |
Leaves | 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. |
reduced to tendrils, unbranched or branched, 1–4 cm; stipules ovate, 10–35 × 10–25 mm, base hastate, margins entire; leaflets 0. |
Inflorescences | 2–4-flowered, 7–12 cm. |
1-flowered, 2–4 cm. |
Flowers | 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. |
6–10 mm; calyx lobes equal, lateral lobes broadly lanceolate, longer than tube; corolla yellow, banner erect, blade equal to claw, wings equal to keel; ovary glabrous. |
Legumes | 40–50 × 8–10 mm, short-stipitate. |
15–30 × 5–7 mm. |
2n | = 14. |
= 14. |
Lathyrus eucosmus |
Lathyrus aphaca |
|
Phenology | Flowering Apr–Jun. | Flowering May–Jun. |
Habitat | Dry soils in washes, pinyon-juniper woodlands, oak-brush, ponderosa pine forests, open prairies, grasslands. | Roadsides, waste areas. |
Elevation | 1200–2500 m. (3900–8200 ft.) | 0–700 m. (0–2300 ft.) |
Distribution |
AZ; CO; NM; TX; UT; WY; Mexico (Coahuila)
|
AL; AR; CA; KY; LA; MD; NE; OR; PA; TN; TX; WA; Eurasia [Introduced in North America; introduced also in n, e Africa]
|
Discussion | 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. brachycalyx subsp. eucosmus, L. brachycalyx var. eucosmus | |
Name authority | Butters & H. St. John: Rhodora 19: 160. (1917) | Linnaeus: Sp. Pl. 2: 729. (1753) |
Web links |