Lathyrus laetivirens |
Lathyrus tuberosus |
|
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aspen pea, aspen peavine, aspen vetchling, plateau peavine, plateau vetchling |
earth-nut pea, earth-nut peavine, tuber vetchling, tuberous pea, tuberous sweetpea |
|
Habit | Herbs perennial, from rhizome, glabrous. | Herbs perennial, from tuber-bearing rhizome, glabrous. |
Stems | angled, sprawling to erect, basally branched 0–3 times, 2–8 dm. |
not winged, sprawling, branched along trailing stems several times, 2–6 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. |
0.5–2 cm; tendrils well developed; stipules filiform-linear, 5–10 × 1–3 mm, much smaller than leaflets; leaflets 2, blades lanceolate, 10–40 × 5–15 mm, surfaces glabrous. |
Inflorescences | 2–5-flowered, 4–7 cm. |
4–6-flowered, 6–15 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. |
8–12 mm; calyx lobes unequal, lateral lobes linear-triangular, equal to tube; corolla reddish, banner erect, blade longer than claw, wings equal to keel; ovary glabrous, style rotated 90° from ovary axis. |
Legumes | 30–50 × 5–15 mm. |
20–30(–40) × 3–6 mm. |
2n | = 14. |
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Lathyrus laetivirens |
Lathyrus tuberosus |
|
Phenology | Flowering Apr–Jul. | Flowering Apr–Jun. |
Habitat | Flats, hillsides, sagebrush communities, pinyon-juniper, oak, pine, aspen and Douglas-fir forests. | Roadsides, meadows, fields. |
Elevation | 1200–3200 m. (3900–10500 ft.) | 50–100 m. (200–300 ft.) |
Distribution |
AZ; CO; NM; NV; UT
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CT; IA; IL; IN; KY; MA; ME; MI; MN; MO; MT; NE; NH; NJ; NY; OH; PA; TN; VT; WA; WI; WV; MB; ON; QC; SK; Europe; w Asia [Introduced in North America; introduced also in 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.) |
|
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 |