Glabrous perennial herbs; roots fusiform. Stems erect, leafy. Lvs simple, crenate, serrate, or pinnatifid, usually variable on one plant. Infl. a terminal ebracteate panicle; lateral axillary racemes often present. Sepals erecto-patent, not saccate. Petals white. Stamens 6, without appendages. Lateral nectaries 4, beside bases of single stamens; median nectaries 2, between bases of paired stamens. Style short; stigma large, capitate or shallowly 2-lobed. Silicle ellipsoid or spherical, septate, dehiscent; valves convex with indistinct network of veins. Seeds ovoid, compressed, not winged, in 2 rows per locule.