Herbs, perennial. Stems erect, to 100 cm tall. Leaves 3-foliolate; petiole 1.5-2 cm, grayish yellow uncinate and sparsely white pubescent; terminal leaflet blade nearly obtriangular, 2-3 × 1.5-2.4 cm, base broadly cuneate or nearly rounded, apex truncate or emarginate; lateral ones obovate, 1.5-2.4 × 0.9-1.4 cm, lateral veins 4 or 5 on each side of midvein, abaxially gray appressed pubescent, adaxially gray pubescent, base cuneate, apex truncate. Panicles terminal or axillary, 6-12 cm, 1-or 2-flowered at each node of rachis; internodes 5-8 mm. Pedicel 5-6 mm, densely grayish yellow uncinate pubescent. Calyx ca. 6 mm, upper 2 lobes connate. Legume 2-or 3-jointed, wholly enclosed by calyx; articles ellipsoidal, 2.5-3 × ca. 2 mm, reticulate veined, extremely shortly uncinate pubescent. Fl. and fr. Sep-Nov.
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