Lathyrus laetivirens |
Lathyrus odoratus |
|
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aspen pea, aspen peavine, aspen vetchling, plateau peavine, plateau vetchling |
common sweet pea, gesse odorante, sweet pea, sweet vetchling |
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Habit | Herbs perennial, from rhizome, glabrous. | Herbs annual, glabrous or sparsely pubescent. |
Stems | angled, sprawling to erect, basally branched 0–3 times, 2–8 dm. |
broadly winged, climbing, basally branched 1–3 times, 8–30 dm. |
Leaves | 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. |
2–6 cm, rachises winged; tendrils well developed; stipules lanceolate, 10–25 × 2–6 mm, smaller than leaflets; leaflets 2, blades ovate or obovate, 15–50 × 10–40 mm, surfaces glabrous or sparsely pustulose-hirsute. |
Inflorescences | 2–5-flowered, 4–7 cm. |
2–4-flowered, 10–20 cm. |
Flowers | 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. |
20–25 mm; calyx lobes equal, lateral lobes linear-triangular to lanceolate, equal to tube; corolla white, pink, purple, violet, or blue, banner erect, blade much longer than claw, wings longer than keel; ovary densely pustulose-hirsute, style rotated 90° from ovary axis. |
Legumes | 30–50 × 5–15 mm. |
50–70 × 8–15 mm. |
2n | = 14. |
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Lathyrus laetivirens |
Lathyrus odoratus |
|
Phenology | Flowering Apr–Jul. | Flowering Apr–May. |
Habitat | Flats, hillsides, sagebrush communities, pinyon-juniper, oak, pine, aspen and Douglas-fir forests. | Disturbed areas. |
Elevation | 1200–3200 m. (3900–10500 ft.) | 50–400 m. (200–1300 ft.) |
Distribution |
AZ; CO; NM; NV; UT
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AZ; CA; CT; IL; IN; KY; ME; MI; OH; OK; SC; TN; TX; VA; WV; MB; NF; ON; QC; Europe [Introduced in North America; introduced also in Mexico (México), Asia (China, India), n, e Africa, Pacific Islands (New Zealand), Australia]
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Discussion | 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.) |
Lathyrus odoratus is cultivated as an ornamental and is an occasional escape. (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. lanszwertii var. laetivirens, L. leucanthus var. laetivirens | |
Name authority | Greene ex Rydberg: Fl. Colorado, 217. (1906) | Linnaeus: Sp. Pl. 2: 732. (1753) |
Web links |