Sparsely hairy or glabrate, to 8 dm; lfls 10-25 pairs, 1-2 cm, ovate-oblong; pet usually 6, white, 5-9 mm; frs straight, pubescent; 2n=14, 16. Native of Eurasia, occasionally escaped from cult. in e. U.S. May-July. (F. hexapetala)
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.