Cowpea Vigna unguiculata, copyright Harry Rose.

Belongs within: Phaseolinae.

Vigna is a pantropical genus of twining or erect herbaceous legumes, a number of which are cultivated as food plants. Notable members include the mung bean V. radiata which has yellow flowers, often partially tinged with pink, and hispid stems and legumes with brown hairs. The adzuki bean V. angularis produces beans that are most commonly eaten sweetened as red bean paste.

Characters (from Flora of China): Twining or erect herbs, rarely subshrubs. Leaves pinnately 3-foliolate; stipules peltate or basally spurred, 2-lobed, cordate, or truncate. Racemes axillary or terminal, nodes of rachis often thickened and glandular. Bracts and bracteoles deciduous. Calyx 5-toothed, 2-lipped. Corolla yellow, blue, or purple; standard suborbicular, base appendaged; wings shorter than standard; keel subequal to wings, incurved, not beaked or produced into an incurved or spirally twisted beak. Stamens diadelphous; anthers uniform. Ovary sessile; style filiform, upper part thickened, bearded or hirsute lengthwise inside; stigma oblique. Legumes linear or linear-oblong, terete or flat. Seeds reniform or subquadrate; hilum short or elongate, with or without aril.

    |--V. aconitifoliaPP07
    |--V. angularisT91
    |--V. dalzellianaSR07
    |--V. lanceolataB12
    |    |--V. l. var. lanceolataB12
    |    `--V. l. var. filiformisB12
    |--V. luteaR44
    |--V. luteolaB00
    |--V. marinasM99
    |--V. radiataB00
    |    |--V. r. var. radiataLK14
    |    |--V. r. var. setulosaLK14
    |    `--V. r. var. sublobataLK14
    |--V. sesquipedalesM99 [=V. unguiculata ssp. sesquipedalisBMM99]
    |--V. sinensisB88
    |--V. trilobataPP07
    |--V. unguiculataCP13
    `--V. vexillataB00
         |--V. v. var. vexillataLK14
         `--V. v. var. angustifoliaLK14

*Type species of generic name indicated


[B88] Bouček, Z. 1988. Australasian Chalcidoidea (Hymenoptera): A biosystematic revision of genera of fourteen families, with a reclassification of species. CAB International: Wallingford (UK).

[B00] Braby, M. F. 2000. Butterflies of Australia: their identification, biology and distribution vol. 2. CSIRO Publishing: Collingwood (Victoria).

[B12] Braby, M. F. 2012. The butterflies of El Questro Wilderness Park, with remarks on the taxonomy of the Kimberley fauna, Australia. Records of the Western Australian Museum 27 (2): 161–175.

[BMM99] Braun, U., J. Mouchacca & E. H. C. McKenzie. 1999. Cercosporoid hyphomycetes from New Caledonia and some other South Pacific islands. New Zealand Journal of Botany 37: 297–327.

[CP13] Cardoso, D., R. T. Pennington, L. P. de Queiroz, J. S. Boatwright, B.-E. Van Wyk, M. F. Wojciechowski & M. Lavin. 2013. Reconstructing the deep-branching relationships of the papilionoid legumes. South African Journal of Botany 89: 58–75.

[LK14] Lyons, M. N., G. J. Keighery, L. A. Gibson & T. Handasyde. 2014. Flora and vegetation communities of selected islands off the Kimberley coast of Western Australia. Records of the Western Australian Museum Supplement 81: 205–244.

[M99] Matthews, M. 1999. Heliothine Moths of Australia: A guide to bollworms and related noctuid groups. CSIRO Publishing.

[PP07] Pandey, R. P., & P. M. Padhye. 2007. Studies on phytodiversity of Arid Machia Safari Park-Kailana in Jodhpur (Rajasthan). Bulletin of the Botanical Survey of India 49: 15–78.

[R44] Rayment, T. 1944. A critical revision of species in the zonata group of Anthophora by new characters (part I). Dobutu Gaku—Iho 1 (1): 1–33.

[SR07] Sankar, R. V., K. Ravikumar, N. M. Ganesh Babu & D. K. Ved. 2007. Botany of Anapady MPCA, Palghat district, Kerala with special emphasis on species of conservation concern. Bulletin of the Botanical Survey of India 49: 165–172.

[T91] Tanigoshi, L. K. 1991. Tetranychus urticae Koch: its control and impact on azuki bean culture in eastern Washington. In: Dusbábek, F., & V. Bukva (eds) Modern Acarology: Proceedings of the VIII International Congress of Acarology, held in České Budĕjovice, Czechoslovakia, 6–11 August 1990 vol. 2 pp. 737–740. SPB Academic Publishing: The Hague.

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