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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.

1 Corolla pale yellow or yellow with green or white; calyx longer than first article of legume; legume glabrous   (2)
+ Corolla purplish blue or pinkish purple; calyx shorter than first article of legume or slightly longer; legume pubescent   (3)
2 (1) Lobes of calyx not ciliate; corolla pale yellow or yellow with green; leaflets linear to linear-lanceolate.   4 A. bupleurifolius
+ Lobes of calyx densely yellow ciliate; corolla white; leaflets oblong, rarely orbicular or linear-lanceolate.   5 A. rugosus
3 (1) Whole leaflets oblong or nearly orbicular; legume cylindric-moniliform, constricted between articles, without raised linear ridges.   3 A. yunnanensis
+ Upper leaflets usually ovate-oblong or lanceolate, lower ones nearly orbicular to ovate; legume compressed cylindric, not constricted between articles, with raised linear ridges   (4)
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.   1 A. vaginalis
+ 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.   2 A. ovalifolius

Lower Taxa


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