Annual herb with taproot, glabrous, 50-150 cm high. Stem solitary, erect or in basal part ascending, shining, mostly rather stout, with many long erecto-patent branches. Leaves petiolate, auriculate, 3-17 by 1-8 cm, lyrato-pinnate with 1-3 pairs of oblong-elliptic lateral lobes, 0.8-4 by 0.3-1.5 cm; terminal lobe elliptic-ovate, 1.5-7 by 0.8-2.5 cm; margins crenulate-serrulate. Racemes terminal on stem and side-branches, ebracteate or with a few bracts in the lowest part, in flowers very condensed, in fruit rather loose, sometimes branched, up to 25 cm long; pedicels patent, the lower somewhat curved, 5-10 mm long. Sepals elliptic, 1.5-1.8 mm long. Petals yellow, spathulate, 2-2.5 mm long. Stamens 6; anthers c. 0.5 mm long; filaments narrowly subulate. Ovary cylindrical with a c. 0.3 mm long style. 5/7/-quae sausage-shaped, often curved, 12-17 by 1.5-2.7 mm; valves thin; style 0.9-1.5 by 0.2-0.3 mm, with a broader stigma. Seeds yellow brown, spheroid, finely colliculate and with prominent irregular warts around the margin, c. 1.2 mm long.
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