Annuals; eglandular; sparsely to moderately pubescent, sometimes glabrous distally, not canescent, trichomes dendritic. Stems erect, usually branched basally or slightly distally, rarely unbranched, (0.7-)0.9-3.2(-4.5) dm. Basal leaves: petiole 0.5-1.5 cm; blade pinnate, ovate or oblong in outline, 0.8-2.5 cm, lateral lobe (2-5 pairs), margins dentate or entire. Cauline leaves sessile or shortly petiolate; blade smaller distally, distal lobes often narrower, sparsely to moderately pubescent. Racemes considerably elongated in fruit. Fruiting pedicels divaricate-ascending (often at 20-45º angle), straight, (1.5-)2.5-7(-10) mm. Flowers: sepals ascending, yellowish, oblong, 0.7-1.2 mm, pubescent; petals narrowly oblanceolate, 0.8-1.2 × 0.2-0.4 mm; median filaments 1-1.5 mm; anthers 0.1-0.2 mm. Fruits erect or ascending, linear, not or slightly torulose, (0.4-) 5-8(-10) × 0.7-1 mm; valves each with distinct midvein; septum not veined; ovules 6-12 per ovary; style 0.1-0.2 mm, glabrous. Seeds uniseriate, brown, oblong, 0.6-0.8 × 0.4-0.5 mm. 2n = 14.
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