Lathyrus venosus |
Lathyrus pusillus |
|||||||||
---|---|---|---|---|---|---|---|---|---|---|
bushy vetchling, veiny pea, veiny peavine |
singletary vetchling, tiny pea |
|||||||||
Habit | Herbs perennial, from rhizome, glabrous or pubescent. | Herbs annual, glabrate. | ||||||||
Stems | angled, sprawling or climbing, basally branched 0–3 times, 4–10 dm. |
narrowly winged, sprawling or climbing, basally branched 0–4 times, 3–6 dm. |
||||||||
Leaves | 6–18 cm; tendrils well developed; stipules lanceolate to linear, 10–20 × 2–10 mm, much smaller than distal leaflets (less than 1/4 width of distal leaflets); leaflets 8–14, scattered, blades ovate to lanceolate, 25–70 × 10–35 mm, surfaces glabrous or pubescent. |
1–3 cm; tendrils well developed; stipules linear, 10–20 × 2–5 mm, equal to smaller leaflets; leaflets 2, blades linear, 15–60 × 2–8 mm, surfaces glabrous. |
||||||||
Inflorescences | 5–20-flowered, 6–20 cm. |
terminal, 1- or 2-flowered, 2–4 cm. |
||||||||
Flowers | 10–15 mm; calyx lobes unequal, lateral lobes linear-triangular or lanceolate, shorter to longer than tube; corolla blue-purple to rose, banner erect, blade equal to claw, wings equal to keel; ovary glabrous or pubescent. |
7–10 mm; calyx lobes subequal, linear-triangular, usually longer than tube; corolla blue, banner erect, blade equal to claw, wings equal to keel; ovary glabrous. |
||||||||
Legumes | 20–50 × 3–7 mm. |
30–50 × 2–4 mm. |
||||||||
2n | = 14. |
|||||||||
Lathyrus venosus |
Lathyrus pusillus |
|||||||||
Phenology | Flowering Mar–May. | |||||||||
Habitat | Roadsides, pastures, prairies, open habitats. | |||||||||
Elevation | 0–800 m. (0–2600 ft.) | |||||||||
Distribution |
North America
|
AL; AR; FL; KS; LA; MO; MS; NC; OK; TX; VA; South America (Argentina, Brazil, Chile, Ecuador, Paraguay, Peru, Uruguay) |
||||||||
Discussion | Varieties 3 (3 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Lathyrus pusillus, the only North American member of section Notolathyrus, a section centered in South America, is also the only annual species of Lathyrus native to North America. It is native to the southeastern United States; it has been cultivated as a forage crop in Oregon and occasionally escapes, but it has not become naturalized there. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
||||||||
Key |
|
|||||||||
Source | FNA vol. 11. | FNA vol. 11. | ||||||||
Parent taxa | Fabaceae > subfam. Faboideae > Lathyrus | Fabaceae > subfam. Faboideae > Lathyrus | ||||||||
Sibling taxa | ||||||||||
Subordinate taxa | ||||||||||
Name authority | Muhlenberg ex Willdenow: Sp. Pl. 3: 1092. (1802) | Elliott: Sketch Bot. S. Carolina 2: 223. (1823) | ||||||||
Web links |