Annual herb. Stem erect, hairy, to 1 m tall. Lvs and petioles with fine stiff hairs. Rosette lvs deeply lyrate-pinnatifid to lyrate-pinnate, (3)-7-25-(30) × (1.5)-2-9-(12) cm; terminal leaflet not lobed or 2-3-lobed, broadly toothed, ovate to reniform; lateral leaflets in 2-6 pairs, ± deflexed, triangular. Upper stem lvs smaller, deeply lyrate-pinnatifid to lyrate-pinnate; terminal leaflet narrow-oblong; lateral leaflets in 1-2 pairs, spreading or ± deflexed. Uppermost stem lvs becoming simple and hastate to narrow-triangular. Racemes ebracteate, suberect to spreading, hairy, (10)-20-30-(40) cm long. Pedicels c. 3 mm long, hairy. Sepals hairy, c. 2 mm long, not horned. Petals yellow, 3-4 mm long. Anthers c. 0.5 mm long; filaments > sepals. Silique hairy or glabrous, appressed to stem, tapering evenly from base, 10-15-(20) × 1-2 mm; style c. 0.5 mm long. Seeds oblong, brown, c. 1 mm long.