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FOC | Family List | FOC Vol. 10 | Fabaceae | Vigna

12. Vigna unguiculata (Linnaeus) Walpers, Repert. Bot. Syst. 1: 779. 1842.

豇豆 jiang dou

Annual or perennial herbs, erect, trailing, or twining. Stems 1-3 m, subglabrous. Stipules lanceolate, ca. 1 cm, with a narrow spur below point of attachment; leaflets ovate-rhom­boid, 5-15 × 4-6 cm, lateral ones oblique, puberulent or gla­brous on both surfaces, base acute to rounded, apex acute. Ra­cemes axillary, with 2-6 flowers clustered at top of rachis. Calyx campanulate, 6-10 mm; teeth lanceolate. Standard yel­lowish white or violet, suborbicular, 1.2-3.3 × 1-3.2 cm, apex emarginate; wings blue to purple, subdeltoid; keel usually white or pale, not twisted. Legumes terete, 7.5-30(-90) × 0.6-1 cm. Seeds several, dark red or black, mottled with black or brown, oblong or reniform, 6-12 mm.

Widely cultivated in China [native to Africa and Asia; widely cul­tivated in tropical and subtropical regions].

1 Herbs twining, 2-4 m; legumes 30-80(-90) cm, pendulous, slightly fleshy and inflated when young; seeds 8-12 mm.   12b subsp. sesquipedalis
+ Herbs erect or trailing, 15-80 cm; legumes 7.5-30 cm, more solid and not inflated when young; seeds 6-9 mm   (2)
2 (1) Legumes 20-30 cm, pendulous.   12a subsp. unguiculata
+ Legumes 7.5-13 cm, erect or spreading.   12c subsp. cylindrica

Lower Taxa


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