Annuals or perennials, (40-)60-110 cm tall, puberulent with simple trichomes 0.03-0.08(-0.1) mm. Stems erect, sulcate. Basal and lowermost cauline leaves 3-5-foliolate; petiole 2.5-7 cm, usually narrowly winged, grooved and sparsely to densely puberulent adaxially; leaflet blade lanceolate, (3-)6-14 × (0.8-)2-5 cm, terminal ones usually larger, base cuneate, rounded, or oblique, margin serrate or irregularly dentate, mucronate, apex acuminate-caudate, abaxially puberulent, adaxially sparsely puberulent at least on veins; petiolule of lateral leaflets obsolete to 5 mm. Uppermost leaves simple or rarely 3-foliolate, similar in morphology to leaflets of lower leaves. Racemes terminal and lateral, elongated considerably in fruit. Fruiting pedicels straight, slender, 2-5 mm, erect-ascending, subappressed to rachis. Sepals oblong, 2-2.5 mm. Petals white, spatulate, 2.5-3(-3.5) × ca. 1 mm, base clawed. Filaments white, 2-2.5 mm; anthers oblong, 0.5-0.7 mm. Fruit obovoid, oblong, or ellipsoid, 3-5 × 1.5-2 mm; valves thick; gynophore obsolete or to 0.5 mm; septum absent; style 0.5-1.5(-2) mm. Seeds 1-3, brown to blackish brown, oblong, 1.5-2.5 × 1-1.4 mm, reticulate. Fl. May-Jun, fr. Jun-Aug. 2n = 42*.
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