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130. Alysicarpus Necker ex Desvaux, J. Bot. Agric. 1: 120. 1813.
链荚豆属 lian jia dou shu
Authors: Puhua Huang & Hiroyoshi Ohashi
Herbs, perennial. Stems erect or diffuse, branched. Leaves 1-foliolate, rarely pinnately 3-foliolate, stipulate and stipellate; stipules scarious or nearly leathery, free or connate. Racemes axillary or terminal; flowers small, mostly ca. 5 mm, usually binate at each node of rachis; bracts scarious, early deciduous. Calyx 4-lobed; lobes dry, rigid, nearly equal, upper lobe 2-toothed at apex. Corolla not or slightly longer than calyx; standard broad, obovate or nearly orbicular; keel obtuse, adherent to wings. Stamens diadelphous (9+1); anthers uniform. Ovary sessile or nearly so, many ovuled; style linear, incurved; stigma capitate. Legume cylindric, swollen, many jointed, 1-seeded per article, indehiscent.
About 30 species: tropical Africa, Asia, Australia, and tropical America; five species (one endemic, one introduced) in China.
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| 1 |
Corolla pale yellow or yellow with green or white; calyx longer than first article of legume; legume glabrous |
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(2) |
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Corolla purplish blue or pinkish purple; calyx shorter than first article of legume or slightly longer; legume pubescent |
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(3) |
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| 2 (1) |
Lobes of calyx not ciliate; corolla pale yellow or yellow with green; leaflets linear to linear-lanceolate. |
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4 A. bupleurifolius |
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Lobes of calyx densely yellow ciliate; corolla white; leaflets oblong, rarely orbicular or linear-lanceolate. |
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5 A. rugosus |
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| 3 (1) |
Whole leaflets oblong or nearly orbicular; legume cylindric-moniliform, constricted between articles, without raised linear ridges. |
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3 A. yunnanensis |
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Upper leaflets usually ovate-oblong or lanceolate, lower ones nearly orbicular to ovate; legume compressed cylindric, not constricted between articles, with raised linear ridges |
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(4) |
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| 4 (3) |
Leaflets usually uniform but variable in size, ovate, oblong, or oblong-elliptic, reticulate veinlets prominent on both surfaces; inflorescences laxly flowered; loments with septa inside and with furrows at joint; prostrate or spreading perennial herbs. |
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1 A. vaginalis |
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Leaflets distinctly dimorphic, lower ones orbicular to broadly oblong, upper ones lanceolate, reticulate veinlets obscure on both surfaces; inflorescences densely flowered; loments without septa inside and with ridges at joint; erect or spreading annual herbs. |
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2 A. ovalifolius |
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Lower Taxa
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