Biennial, sometimes perennial, herbs with stout taproot and many lesser roots. Hairs simple, or 0. Stems erect, leafy. Lvs often glossy, glabrous or sparsely hairy; margins usually bluntly toothed; lower lvs lyrate-pinnate or pinnatifid; upper lvs becoming ± sessile, amplexicaul, either deeply pinnatifid or shallowly lobed to toothed. Racemes ebracteate, rarely bracteate. Sepals suberect, the inner saccate. Petals yellow. Stamens 6, without appendages. Lateral nectaries 2, crescent-shaped at base of single stamens; median nectaries 2, rod-shaped between paired stamens. Style short; stigma slightly 2-lobed. Silique linear, dehiscent; valves with strong median and weaker reticulate lateral veins; beak 0. Seeds ellipsoid, not winged, in 1 row per locule.