Annuals; glandular or eglandular; sparsely to densely pubescent, trichomes dendritic. Stems erect, branched basally and distally, (often purplish), (1-)1.5-3.2(-4.1) dm. Basal leaves (soon withered); petiole 0.3-1.3 cm; blade pinnate, oblanceolate to obovate in outline, 1.5-3 cm, lateral lobes oblong to linear or lanceolate, (1-5 × 0.3-1 mm), margins entire or dentate. Cauline leaves sessile; blade smaller distally, distal lobes often narrower, surfaces moderately to densely pubescent. Racemes considerably elongated in fruit. Fruiting pedicels divaricate to ascending, straight, 2.5-7(-9) mm. Flowers: sepals spreading to ascending, pale yellow, oblong, 0.8-1.2 mm, pubescent; petals oblanceolate, 0.9-1.3 × 0.2-0.5 mm; median filaments 0.8-1.2 mm; anthers 0.1-0.2 mm. Fruits divaricate to erect, usually obovoid to clavate, rarely broadly ellipsoid, not torulose, 2-5 × 1-2 mm, (acute basally, obtuse apically); valves each with obscure midvein; septum not veined; ovules 4-10 per ovary; style 0.05-0.3 mm, glabrous. Seeds uniseriate or biseriate, brown, oblong, 0.8-1.2 × 0.5-0.6 mm.
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