Rhynchosia chinensis H.T.Chang ex Y.T.Wei & S.K.Lee

Herbs. Stems twining or climbing, densely pubescent or sometimes sparsely villous. Leaves pinnately 3-foliolate; stip­ules small, ovate, ca. 4 mm, sparsely pubescent, deciduous; petiole 4-10 cm, densely pubescent; stipels bristlelike; petio­lules ca. 3 mm, densely pubescent; leaflets thinly leathery; ter­minal leaflet lanceolate to ovate-lanceolate, 9-15 × 3.5-8 cm, sparsely pubescent, abaxial surface with yellow-brown sessile glands, basal veins 3, lateral veins 3-5 pairs, base broadly cu­neate or rounded, margin slightly sinuate, apex caudate-acumi­nate; lateral leaflet smaller, obliquely ovate. Raceme axillary, branched, up to 27 cm; bracts ovate, ca. 4 mm, deciduous; pe­duncle 1-3 cm, densely pubescent. Flowers small, ca. 1.1 cm, sparse; pedicels slender, 4-7 mm, pubescent. Calyx campan­ulate, ca. 5 mm, 5-lobed; lobes triangular, shorter than tube, sparsely hairy or almost glabrous. Corolla yellow, petals ob­viously stipitate, almost glabrous; standard ovate-orbicular or almost orbicular, ca. 1 cm, base with 2 slender auricles and accessory callosity; wings extremely narrow, apex acute, base with 2 auricles, one longer; keels slightly curved, with long beak. Ovary sparsely hairy; style linear, glabrous; stigma capi­tate. Legume reddish purple, oblong, ca. 1.5 × 1 cm, com­pressed, glabrous or almost glabrous, slightly constricted be­tween seeds, with small beak. Seeds blackish purple, subor­bicular, ca. 4 mm in diam. Fl. and fr. summer and autumn. Fr. Sep.