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Vigna vexillata (Linn.) A. Rich., Hist.Fis.polit.nat.l,Cuba (Spanish ed.). 11:191. 1845. & in Sagra, Ess.Fl.Cuba 440.1846; Baker in Hook.f., Fl.Brit.Ind.2:206.1876.
Vern.: Halunda.
Phaseolus vexillatus Linn.Vigna capensis auct. non (Linn.) Walp.: Cooke
Perennial climbing or trailing herb. Stem glabrescent or at least not densely pubescent. Leaf trifoliolate, petiole 1.5-11.0 cm long, leaflets 2.5-8.0 cm long, 0.5-25 mm broad, ovate to lanceolate, acute or acuminate, glabrescent or not densely pubescent; petiolules 2-4 mm long; stipules 5-13 mm long. Inflorescence axillary 2-6-flowered, subumbellate. Peduncle 4.5-36 cm long. Pedicel 1-2 mm long. Bracteoles 5-8 mm long. Calyx pubescent, tube 5-7 mm long, teeth 2.0-8.0 mm long, the upper pair partly united. Corolla yellow, pink or purple, glabrous. Vexillum 2.0-3.5 cm long. Fruit 4-14 cm long, 2.5-4.0 mm broad, pubescent, hairs stiff, dark brown, 10-18-seeded.
Fl.Per.: September-October.
Lectotype: Cuba, Havana; Phaseolus fore odorato vexillo amplo patulo of Dill.,Hort. Elth.t.234/302.1732.
Distribution: Cosmopolitan in Tropics including Pakistan.
Verdcourt (in Milne-Redhead & Polhill, Fl.Trop.E.Afr.(Leguminosae 4) 653.1971) recognises 3 varieties.
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