Lathyrus eucosmus |
Lathyrus latifolius |
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bush vetchling, seemly pea |
broad-leaf peavine, everlasting or perennial sweet pea, everlasting pea, everlasting peavine, everlasting vetchling, perennial pea, perennial peavine, perennial sweet pea, sweet pea |
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Habit | Herbs perennial, from rhizome, glabrous or puberulent. | Herbs perennial, from rhizome, glabrous. |
Stems | angled, erect, basally branched 0–2 times, 2–5 dm. |
broadly winged, sprawling or climbing, basally branched 1–5 times, 8–20 dm. |
Leaves | 2–4 cm; tendrils simple or branched, sometimes prehensile; stipules linear, 5–15 × 1–2 mm, much smaller than leaflets; leaflets 6 or 8, scattered, blades ovate to lanceolate, 15–45 × 4–10 mm, surfaces glabrous throughout or puberulent abaxially. |
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. |
Inflorescences | 2–4-flowered, 7–12 cm. |
5–15-flowered, 10–33 cm. |
Flowers | 18–20 mm; calyx lobes unequal, lateral lobes deltate, shorter than tube; corolla blue-purple, banner erect, blade longer than claw, wings equal to keel (held above keel); ovary glabrous. |
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. |
Legumes | 40–50 × 8–10 mm, short-stipitate. |
50–110 × 5–10 mm. |
2n | = 14. |
= 14. |
Lathyrus eucosmus |
Lathyrus latifolius |
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Phenology | Flowering Apr–Jun. | Flowering May–Sep. |
Habitat | Dry soils in washes, pinyon-juniper woodlands, oak-brush, ponderosa pine forests, open prairies, grasslands. | Roadsides, disturbed areas. |
Elevation | 1200–2500 m. (3900–8200 ft.) | 50–2100 m. (200–6900 ft.) |
Distribution |
AZ; CO; NM; TX; UT; WY; Mexico (Coahuila)
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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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Discussion | Lathyrus eucosmus is known from the northern two-thirds of Arizona northward to southeastern Utah, and eastward in southeastern Wyoming, Colorado, New Mexico, and Texas to the edge of the Great Plains. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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.) |
Source | FNA vol. 11. | FNA vol. 11. |
Parent taxa | Fabaceae > subfam. Faboideae > Lathyrus | Fabaceae > subfam. Faboideae > Lathyrus |
Sibling taxa | ||
Synonyms | L. brachycalyx subsp. eucosmus, L. brachycalyx var. eucosmus | |
Name authority | Butters & H. St. John: Rhodora 19: 160. (1917) | Linnaeus: Sp. Pl. 2: 733. (1753) |
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