Perennial from a slender rhizome, decumbent or ascending, 2-4 dm; basal and cauline lvs nearly alike, but the cauline gradually smaller and with shorter petioles, trifoliolate or the middle and upper often simple; petioles with a pair of small (0.5-4 mm) auricles at the base, or sometimes exauriculate; lfls obovate or rotund to broadly ovate or reniform, entire or commonly shallowly few-lobed, the terminal usually 2-5 cm long and wide, each lobe mucronate; pet white, 6-8 mm; mature pedicels ascending, 5-12 mm; frs erect or ascending, 2-4 cm, the beak 2-3 mm. Wet places in the mts.; Va. and s. W.Va. to S.C., Ga. and Tenn. Apr.-June. Plants without petiolar auricles are sometimes treated as a distinct sp., C. flagellifera O. E. Schulz (C. hugeri)
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.