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115. Phaseolus Linnaeus, Sp. Pl. 2: 723. 1753.
菜豆属 cai dou shu
Authors: Delin Wu & Mats Thulin
Twining or erect herbs, often with hooked hairs. Stipules basifixed, persistent, not produced below point of insertion. Leaves pinnately 3-foliolate; stipels present. Racemes axillary, flowers at swollen nodes. Bracts and bracteoles persistent or deciduous. Calyx 2-lipped, upper pair of teeth connate, lower lip 3-toothed. Corolla yellow, white, red, or purple; petals clawed; standard suborbicular, reflexed, sometimes with appendages at base; wings obovate or oblong, adherent to keel; keel linear, beak long, spirally coiled through 1-5 turns. Stamens diadelphous. Style spirally coiled through at least 360°; stigma oblique. Legumes linear or oblong, subterete or compressed. Seeds 2 to many, oblong or reniform; hilum shortly linear, estrophiolate.
About 50 species: native to tropical America; three species (all introduced) in China.
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Bracteoles inconspicuous, shorter than calyx tube. |
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3 P. lunatus |
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Bracteoles conspicuous, longer than calyx tube |
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(2) |
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| 2 (1) |
Inflorescences shorter than leaves; legumes linear-oblong, slightly curved, not broadened toward top. |
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1 P. vulgaris |
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Inflorescences longer than leaves; legumes falcate-oblong, broadened toward top. |
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2 P. coccineus |
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Lower Taxa
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