Lathyrus ochroleucus |
Lathyrus laetivirens |
|
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cream pea, cream vetchling, cream-flower peavine, cream-flower sweet pea, creamy peavine, pale vetchling |
aspen pea, aspen peavine, aspen vetchling, plateau peavine, plateau vetchling |
|
Habit | Herbs perennial, from rhizome, glabrous except calyx ciliate. | Herbs perennial, from rhizome, glabrous. |
Stems | angled, sprawling or climbing, basally branched 0–3 times, 3–8 dm. |
angled, sprawling to erect, basally branched 0–3 times, 2–8 dm. |
Leaves | (2–)3–10 cm; tendrils well developed; stipules somewhat foliose, ovate-lanceolate, 15–35 × 5–20 mm, sometimes equal to distal leaflets; leaflets (5 or)6(–8), usually paired, blades broadly ovate to lanceolate, (20–)25–65 × 10–35(–42) mm, surfaces glabrous. |
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. |
Inflorescences | 4–10(–13)-flowered, 3–12 cm. |
2–5-flowered, 4–7 cm. |
Flowers | 10–15 mm; calyx lobes unequal, lateral lobes lanceolate, usually longer than tube; corolla cream-white, banner erect, blade longer than claw, wings equal to keel; ovary glabrous. |
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. |
Legumes | 30–70 × 4–7 mm. |
30–50 × 5–15 mm. |
2n | = 14. |
|
Lathyrus ochroleucus |
Lathyrus laetivirens |
|
Phenology | Flowering Apr–Jul. | Flowering Apr–Jul. |
Habitat | Moist woodlands, clearings, thickets, glades, meadows. | Flats, hillsides, sagebrush communities, pinyon-juniper, oak, pine, aspen and Douglas-fir forests. |
Elevation | 0–1500 m. (0–4900 ft.) | 1200–3200 m. (3900–10500 ft.) |
Distribution |
AK; IA; ID; IL; IN; MI; MN; MT; ND; NE; NJ; NY; OH; PA; SD; VT; WA; WI; WV; WY; AB; BC; MB; NT; NU; ON; QC; SK; YT
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AZ; CO; NM; NV; UT
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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. nevadensis subsp. stipulaceus | L. lanszwertii var. laetivirens, L. leucanthus var. laetivirens |
Name authority | Hooker: Fl. Bor.-Amer. 1: 159. (1831) | Greene ex Rydberg: Fl. Colorado, 217. (1906) |
Web links |