Annuals or biennials; sparsely hirsute basally, glabrous distally. Rhizomes absent. Stems (simple from base), erect, (not flexuous), unbranched or branched distally, (0.5-)1.5-5.5(-7) dm. Basal leaves (soon withered), not rosulate, similar to proximalmost cauline leaves, 4-15 cm. Cauline leaves (3-)5-20(-35), pinnately (5 or) 7-13(-19)-foliolate, sometimes appearing pinnatisect, lobe number similar to leaflets (middle and proximal ones 2-11 cm), petiolate, leaflets petiolulate, subsessile, or sessile; petiole (0.4-)1-3.5(-4.5) cm, base not auriculate, (often sparsely hirsute); lateral leaflets shortly petiolulate or sessile, (decurrent on rachis smaller than terminal, distalmost blades narrower, with fewer lobes or leaflets), margins entire or crenate; terminal leaflet (subsessile or petiolule to 1 cm), blade suborbicular, obovate to oblanceolate, or elliptic, 1.3-3(-4) cm × 6-25 mm, base often cuneate, margins entire, repand, or obscurely 3 or 5-lobed. Racemes ebracteate. Fruiting pedicels divaricate-ascending, (3-)4-10(-13) mm. Flowers: sepals oblong, (1-)1.3-2.3 × 0.5-1 mm, lateral pair not saccate basally; petals white, narrowly spatulate to oblanceolate, 2-3.5(-4) × 0.8-1.5 mm, (not clawed); filaments: median pairs 1.5-2.5 mm, lateral pair 1-2 mm; anthers ovate, 0.2-0.3 mm. Fruits linear, (torulose), (1.4-)1.7-2.7(-3.2) cm × 0.8-1.1 mm; ovules 40-80 per ovary; style 0.5-1 mm. Seeds brown, oblong to ovoid, 0.7-1.1 × 0.5-0.8 mm. 2n = 32, 64.
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