Lathyrus palustris |
Lathyrus delnorticus |
|
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gesse des marais, marsh pea, marsh peavine, marsh vetchling |
Del Norte pea |
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Habit | Herbs perennial, from rhizome, glabrous or pubescent. | Herbs perennial, from rhizome, glabrous. |
Stems | narrowly to broadly winged, sprawling or climbing, basally branched 0–4 times, 2–10 dm. |
narrowly winged, erect to climbing, basally branched 0–several times, 2–8 dm. |
Leaves | 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. |
9–13 cm; tendrils well developed; stipules lanceolate, 10–30 × 3–15 mm, sometimes equal to distal leaflets; leaflets 9–12, scattered, blades lanceolate, 30–50 × 5–15 mm, surfaces glabrous. |
Inflorescences | 2–7-flowered, 3–15 cm. |
8–12-flowered, 7–10 cm. |
Flowers | 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. |
9–12 mm; calyx lobes unequal, lateral lobes deltate, shorter than tube; corolla cream-white, banner erect, blade longer than claw, wings equal to keel; ovary glabrous. |
Legumes | 25–60 × 4–8 mm. |
30–40 × 3–5 mm. |
2n | = 14. |
= 14. |
Lathyrus palustris |
Lathyrus delnorticus |
|
Phenology | Flowering Apr–Aug. | Flowering May–Jun. |
Habitat | Coastal and inland wetlands. | Serpentine areas along rivers and creeks in coniferous and mixed evergreen forests. |
Elevation | 0–1800 m. (0–5900 ft.) | 0–1000 m. (0–3300 ft.) |
Distribution |
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
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CA; OR
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Discussion | 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.) |
Lathyrus delnorticus is restricted to Del Norte and western Siskiyou counties in California, and Curry and Josephine counties in Oregon. (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. 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 | Linnaeus: Sp. Pl. 2: 733. (1753) | C. L. Hitchcock: Revis. N. Amer. Lathyrus, 30, fig. 21. (1952) |
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