Perennial with an underground scaleless rhizome from which the stems arise at short intervals; stems erect or slightly decumbent at base, weak, simple to sparsely branched, striated, glabrous below, glabrous to sparsely pubescent above, 2-6 dm. high; leaves all cauline; petioles glabrous, 2-7 cm. long; leaflets 3-5, elliptical to narrowly ovate, obtuse at apex, cuneate at base, irregularly crenate to shallowly toothed, mucronate, 2-6 cm. long, 1-3 cm. wide, sparsely pubescent with simple trichomes; inflorescence bracteate below, bracts absent above; sepals oblong, pubescent, scarious-margined, 2-3 mm. long, inner pair non-saccate, outer pair slightly saccate; petals white, spatulate to ligulate, 6-10 mm. long; fruiting pedicels divaricately ascending, straight, sparsely pubescent, 1-2.5 cm. long; siliques divaricately ascending, 3-6 cm. long, styles 1-3 mm. long; seeds wingless, oblong, 2-3 mm. long, ca. 1.5 mm. wide.
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