Isopyrum biternatum (Raf.) Torr. & A. Gray
Family: Ranunculaceae
Isopyrum biternatum image
Roots with many small, tuber-like thickenings; stems slender, 1-4 dm; basal lvs long-petioled, 2-3-ternate; cauline lvs smaller, less petiolate and less dissected; lfls broadly obovate, 3-lobed; fls white, 1.5-2 cm wide; follicles mostly 4, semi-ovoid, compressed, divergent; 2n=14. Moist woods; w. N.Y. and s. Ont. to Minn., s. to the piedmont of Va. and the Carolinas, and to w. Fla. and Ark. Apr., May. (Enemion b.)

Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.

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