Annual or biennial, densely pubescent; trichomes sessile or short-stipitate, smooth or fine granular, rays long and slender, simple or infrequently forked near base, not appressed, some rays erect; stems several, stout and erect or the outer ones decumbent, simple or branched, stiff and densely foliate, to 4 dm high; basal leaves obovate or elliptical, sinuate or shallowly dentate, petiolate, to about 3 cm long; upper stem leaves sessile, lower usually short-petiolate, obovate to broadly elliptical, sinuate or shallowly toothed, 1-3 cm long; inflorescences compact and dense, elongating in fruit; petals yellow, 6.5-8 mm long; fruiting pedicels somewhat expanding at summit, sigmoid or recurved in age; silicles sessile or nearly so (not stipitate), roughly oblong and broadly elliptical, 5-8 mm long, strongly compressed parallel to the plane of the septum, valves pubescent on exterior with spreading trichomes (or not), sparsely so on interior; styles 3-5 mm long; ovules 2-3 per locule. Flowers June to September.