Herbs, annual, 40-80 cm tall. Stems simple, erect. Stipules broadly triangular, 8-11 mm, hyaline, basally connate. Leaves 6-11 cm, 9-13-foliolate; leaflet blades narrowly lanceolate to linear-oblong, 1.5-3 cm × 2-3 mm, abaxially densely pilose, adaxially glabrous. Racemes lax, with many flowers; bracts ± as long as pedicel; peduncle inconspicuously longer than leaves. Pedicel ca. 3 mm. Calyx campanulate, 4-4.5 mm, glabrous; teeth subulate, 2-3 × as long as tube, margin pilose. Corolla pinkish purple; standard obovate, 5-6 mm; wings ca. 1/4 as long as standard; keel slightly longer than standard. Ovary glabrous. Legume with 1 article; article subglobose, 8-10 mm in diam., subglabrous, margin membranous and entire but repand. Fl. May-Jun, fr. Jun-Jul.
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