Lysimachia terrestris L.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
Species Description - Erect from long, stoloniform rhizomes, 4–8 dm, the stem glabrous, often branched but usually with a single raceme; lvs opposite, punctate, narrowly lanceolate, the principal ones 5–10 cm; elongate bulblets develop in the axils late in the season; raceme erect, 1–3 dm, many-fld, its bracts linear or subulate, 3–8(–10) mm; pedicels 8–15 mm; cor-lobes narrowly elliptic, 5–7 mm, yellow, marked with dark lines; 2n=84. Open swamps and wet soil; Nf. to S.C., w. to Minn., Sask., Io., and Tenn. June–Aug. A vigorous sterile hybrid with no. 7 [Lysimachia thyrsiflora L.], called L. ×commixta Fernald, has numerous peduncled racemes from the middle axils, as well as a terminal raceme; it propagates vegetatively, and sometimes occurs in the absence of the parents.