Annual to perennial, usually taprooted, herbs. Hairs simple to 2-fid or branched. Stems erect, leafy. Lvs entire to pinnatifid; margins entire. Racemes bracteate or ebracteate. Sepals suberect, not saccate. Petals white, lilac or yellow, sometimes 0. Stamens 6, rarely 4, without appendages. Lateral nectaries 4, paired at bases of single stamens or joined in a ring; median nectaries 2, often 2-lobed, joined to lateral nectaries. Style short; stigma capitate or very shortly 2-lobed. Silique linear, dehiscent, not beaked; valves convex, 1-veined. Seeds ovoid, not winged, usually in 1 row per locule.