Much like no. 16 [Ranunculus pensylvanicus L.f.]; some of the roots conspicuously thickened; lvs sparsely villous with straight hairs 1-2 mm, the basal broadly ovate in outline, broadly cuneate to rounded or truncate at base, or a few occasionally subcordate; 2n=16. Dry or moist woods; Mass. to N.C. and W.Va.; s. O. to Tenn., w. to S.D. and Okla. Apr., May.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.