Monographs Details: Lysimachia x producta (A.Gray) Fernald
Authority: Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
Description:Species Description - A ± fertile hybrid derived from nos. 11 [Lysimachia quadrifolia L.] and 12 [Lysimachia terrestris (L.) Britton, Sterns & Poggenb.], more nearly resembling no. 12 [Lysimachia terrestris (L.) Britton, Sterns & Poggenb.], but with the bracts of the well developed terminal raceme larger, the lower ones often foliaceous, pedicels to 3 cm; principal lvs often whorled. Moist soil; Me. to Md. and less commonly to Va., N.C., Ky., and Wis. June, July.