Subshrubs or perennial herbs, 20-30 cm tall. Stem erect or ascending, densely appressed or ascending pubescent. Leaves 3-foliolate; stipules linear-triangular, 4.8-5.5 × 0.7-1.1 mm, 3-or 4-veined; petiole 1.6-2.2 mm; leaflets narrowly obovate, terminal one 1-1.4 cm × 2.5-4.4 mm, abaxially sericeous, adaxially glabrous, base cuneate, apex mucronate. Racemes axillary, slightly longer than subtending leaves, almost sessile, 6-flowered. Pedicel 2.5-3.2 mm, densely appressed or ascending pubescent; bracteoles narrowly ovate, 4-4.8 × ca. 0.9 mm, distinctly longer than calyx tube. Calyx 7.3-9 mm, 5-parted; lobes narrowly triangular, densely appressed or ascending pubescent. Corolla pale yellow, 1.4-1.5 × as long as calyx; standard elliptic, 10.5-12.5 × 5-6 mm, clawed and with 2 auriculate appendages at base; wings obliquely narrowly elliptic, 9.5-11 × 1.5-2 mm, obtuse, slightly auriculate at base, claw ca. 3 mm; keel obliquely elliptic, 10.5-12.5 × 2.8-3.3 mm, apex obtuse. Cleistogamous flowers axillary, sessile, 6-flowered. Legumes and seeds unknown (in China). Fl. Sep.
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