Lathyrus latifolius |
Lathyrus pauciflorus |
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broad-leaf peavine, everlasting or perennial sweet pea, everlasting pea, everlasting peavine, everlasting vetchling, perennial pea, perennial peavine, perennial sweet pea, sweet pea |
few-flower pea, few-flower pea-vine, few-flower vetchling |
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Habit | Herbs perennial, from rhizome, glabrous. | Herbs perennial, from rhizome or thickened rootstock, glabrous. | ||||
Stems | broadly winged, sprawling or climbing, basally branched 1–5 times, 8–20 dm. |
angled, erect, sprawling, or climbing, basally branched 1–3 times, 3–8 dm. |
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Leaves | 2–5 cm, rachises broadly winged; tendrils well developed, branched; stipules lanceolate, 30–40 × 7–15 mm, at least 1/2 width of stem, much smaller than leaflets; leaflets 2, blades lanceolate-elliptic, 30–120 × 7–50 mm, surfaces glabrous. |
6–9 cm; tendrils well developed; stipules ovate to lanceolate, 15–25 × 5–11 mm, much smaller than leaflets; leafets 6–10, scattered, blades lanceolate to linear or ovate, 20–80 × 2–35 mm, surfaces glabrous. |
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Inflorescences | 5–15-flowered, 10–33 cm. |
4–13-flowered, 5–18 cm. |
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Flowers | 15–20 mm; calyx lobes unequal, lateral lobes linear-triangular, shorter than tube; corolla purple, magenta, pink, or white, banner erect, blade longer than claw, wings equal to keel; ovary densely glandular-pubescent, style rotated 90° from ovary axis. |
12–20 mm; calyx lobes unequal, lateral lobes deltate, shorter than tube; corolla pale blue-lavender to purple, banner erect, blade longer than claw, wings longer than keel, (by 1–4 mm); ovary glabrous. |
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Legumes | 50–110 × 5–10 mm. |
30–50 × 5–10 mm. |
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2n | = 14. |
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Lathyrus latifolius |
Lathyrus pauciflorus |
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Phenology | Flowering May–Sep. | |||||
Habitat | Roadsides, disturbed areas. | |||||
Elevation | 50–2100 m. (200–6900 ft.) | |||||
Distribution |
AL; AR; AZ; CA; CO; CT; DC; DE; GA; IA; ID; IL; IN; KS; KY; LA; MA; MD; ME; MI; MN; MO; MS; MT; NC; NE; NH; NJ; NM; NV; NY; OH; OK; OR; PA; RI; SC; TN; TX; UT; VA; VT; WA; WI; WV; WY; BC; NB; NS; ON; PE; QC; Europe [Introduced in North America; introduced also in Mexico, South America (Argentina, Chile, Uruguay), Asia (China, Japan), n, e, s Africa, Pacific Islands (Hawaii, New Zealand), Australia]
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w United States
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Discussion | Lathyrus latifolius is widely naturalized in North America and forms large thickets along roadsides, especially in the Pacific Coast states. M. J. W. Godt and J. L. Hamrick (1991) explored genetic variation within the species as it occurs in North America. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Varieties 2 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 11. | FNA vol. 11. | ||||
Parent taxa | Fabaceae > subfam. Faboideae > Lathyrus | Fabaceae > subfam. Faboideae > Lathyrus | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Name authority | Linnaeus: Sp. Pl. 2: 733. (1753) | Fernald: Bot. Gaz. 19: 335. (1894) | ||||
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