Lathyrus venosus |
Lathyrus laetivirens |
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bushy vetchling, veiny pea, veiny peavine |
aspen pea, aspen peavine, aspen vetchling, plateau peavine, plateau vetchling |
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Habit | Herbs perennial, from rhizome, glabrous or pubescent. | Herbs perennial, from rhizome, glabrous. | ||||||||
Stems | angled, sprawling or climbing, basally branched 0–3 times, 4–10 dm. |
angled, sprawling to erect, basally branched 0–3 times, 2–8 dm. |
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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. |
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. |
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Inflorescences | 5–20-flowered, 6–20 cm. |
2–5-flowered, 4–7 cm. |
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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. |
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. |
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Legumes | 20–50 × 3–7 mm. |
30–50 × 5–15 mm. |
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Lathyrus venosus |
Lathyrus laetivirens |
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Phenology | Flowering Apr–Jul. | |||||||||
Habitat | Flats, hillsides, sagebrush communities, pinyon-juniper, oak, pine, aspen and Douglas-fir forests. | |||||||||
Elevation | 1200–3200 m. (3900–10500 ft.) | |||||||||
Distribution |
North America
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AZ; CO; NM; NV; UT
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Discussion | Varieties 3 (3 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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.) |
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Key |
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Source | FNA vol. 11. | FNA vol. 11. | ||||||||
Parent taxa | Fabaceae > subfam. Faboideae > Lathyrus | Fabaceae > subfam. Faboideae > Lathyrus | ||||||||
Sibling taxa | ||||||||||
Subordinate taxa | ||||||||||
Synonyms | L. lanszwertii var. laetivirens, L. leucanthus var. laetivirens | |||||||||
Name authority | Muhlenberg ex Willdenow: Sp. Pl. 3: 1092. (1802) | Greene ex Rydberg: Fl. Colorado, 217. (1906) | ||||||||
Web links |