Lathyrus laetivirens |
Lathyrus palustris |
|
---|---|---|
aspen pea, aspen peavine, aspen vetchling, plateau peavine, plateau vetchling |
gesse des marais, marsh pea, marsh peavine, marsh vetchling |
|
Habit | Herbs perennial, from rhizome, glabrous. | Herbs perennial, from rhizome, glabrous or pubescent. |
Stems | angled, sprawling to erect, basally branched 0–3 times, 2–8 dm. |
narrowly to broadly winged, sprawling or climbing, basally branched 0–4 times, 2–10 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. |
1–6 cm; tendrils well developed; stipules ovate-lanceolate to linear, 5–25 × 1–10 mm, much smaller than leaflets; leaflets 4–8, paired, blades lanceolate to linear, 15–75 × 2–20 mm, surfaces glabrous, glabrate, or pubescent. |
Inflorescences | 2–5-flowered, 4–7 cm. |
2–7-flowered, 3–15 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. |
10–15 mm; calyx lobes unequal, lateral lobes deltate, shorter than tube; corolla blue-purple, banner erect, blade equal to claw, wings equal to keel; ovary glandular-pubescent. |
Legumes | 30–50 × 5–15 mm. |
25–60 × 4–8 mm. |
2n | = 14. |
|
Lathyrus laetivirens |
Lathyrus palustris |
|
Phenology | Flowering Apr–Jul. | Flowering Apr–Aug. |
Habitat | Flats, hillsides, sagebrush communities, pinyon-juniper, oak, pine, aspen and Douglas-fir forests. | Coastal and inland wetlands. |
Elevation | 1200–3200 m. (3900–10500 ft.) | 0–1800 m. (0–5900 ft.) |
Distribution |
AZ; CO; NM; NV; UT
|
AK; AL; AR; CA; CO; CT; DC; DE; IA; IL; IN; KY; MA; MD; ME; MI; MN; MO; NC; ND; NE; NH; NJ; NY; OH; OR; PA; RI; SD; TN; VA; VT; WA; WI; WV; BC; MB; NB; NL; NS; NU; ON; PE; QC; SK; SPM
|
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.) |
Morphological variation within Lathyrus palustris is extensive. Although the most distinctive forms (see synonyms) have been accorded formal nomenclatural recognition (M. L. Fernald 1911; C. L. Hitchcock 1952), intergradation among these mostly sympatric ecotypes is widespread (D. Isely 1998). In Nunavut, it is known only from Akimiski Island in James Bay. (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 | L. myrtifolius, L. palustris var. linearifolius, L. palustris var. macranthus, L. palustris var. myrtifolius, L. palustris subsp. pilosus, L. palustris var. pilosus, L. palustris var. retusus |
Name authority | Greene ex Rydberg: Fl. Colorado, 217. (1906) | Linnaeus: Sp. Pl. 2: 733. (1753) |
Web links |
|