Lathyrus japonicus |
Lathyrus cicera |
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beach or maritime or sand pea, beach pea, beach vetchling, maritime pea, sea pea, seaside pea |
red pea, red peavine, red vetch or pea |
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Habit | Herbs perennial, from rhizome, glabrous or sparsely pubescent. | Herbs annual, glabrous. | ||||||||
Stems | angled to narrowly winged, erect, sprawling, or climbing, basally branched 0–4 times, 1–10 dm. |
winged, sprawling or climbing, basally branched 0–3 times, 2–10 dm. |
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Leaves | 3–15 cm; tendrils usually well developed, branched or unbranched; stipules sagittate-ovate, 7–35 × 7–30 mm, as large as basal leaflets; leaflets 6–12, usually scattered, blades ovate to lanceolate, 15–55 × 5–35 mm, surfaces glabrous throughout or pubescent abaxially. |
0.5–2 cm, rachises winged as the stem; tendrils well developed; stipules lanceolate, 10–20 × 2–6 mm, sometimes as wide as leaflets; leaflets 2, blades linear, 20–50 × 1–6 mm, surfaces glabrous. |
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Inflorescences | 4–9-flowered, 4–15 cm. |
usually 1-flowered, 1–4 cm. |
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Flowers | 12–29 mm; calyx lobes unequal, lateral lobes linear-triangular, longer than tube; corolla blue to purple, banner erect, blade longer than claw, wings equal to keel; ovary eglandular and glandular-pubescent. |
10–12 mm; calyx lobes equal, lateral lobes linear-triangular, 2–3 times longer than tube; corolla reddish purple, banner erect, blade equal to claw, wings equal to keel; ovary glabrous, style rotated 90° from ovary axis. |
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Legumes | 35–65 × 6–12 mm. |
20–40 × 5–10 mm, broadly winged on abaxial suture. |
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2n | = 14. |
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Lathyrus japonicus |
Lathyrus cicera |
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Phenology | Flowering Apr–May. | |||||||||
Habitat | Disturbed areas. | |||||||||
Elevation | 50–600 m. (200–2000 ft.) | |||||||||
Distribution |
North America; Eurasia [Introduced in s South America]
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CA; Europe [Introduced in North America; introduced also in South America (Argentina, Uruguay)] |
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Discussion | Varieties 3 (3 in the flora). Within Lathyrus japonicus, in the narrow sense, there is a south to north reduction in plant size, including plant height, robustness, and leaflet size, but not flower size, flower number, or fruit size. On the east coast of North America this shift seems fairly abrupt, giving the appearance of a clear distinction between var. maritimus and var. pellitus in the south, and var. japonicus to the north in Labrador and Greenland. However, on the West Coast, there are few truly pubescent forms (var. pellitus), and there seem to be many more intermediates between var. maritimus in the south and var. japonicus to the north. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Lathyrus cicera is cultivated as an ornamental and occasionally escapes. (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 | Willdenow: Sp. Pl. 3: 1092. (1802) | Linnaeus: Sp. Pl. 2: 730. (1753) | ||||||||
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