Stems erect, simple or sometimes branched, 2-13 dm, glabrous; rhizomes slender or somewhat thickened; bulblets absent. Leaves opposite; petiole 0.5-6 cm, long-ciliate along entire length, cilia 0.6-2.1 mm; blade broadly lanceolate to ovate-lanceolate, 4-15 (-17) × 1.5-6.5 cm, base rounded or obtuse to cuneate, somewhat decurrent, margins entire, plane, ciliolate, especially proximally, apex acute to acuminate, surfaces not punctate, glabrous; venation pinnate-arcuate. Inflorescences axillary in distal leaves, solitary flowers. Pedicels (0.5-)1.5-7 cm, usually stipitate-glandular. Flowers: sepals 5, calyx not streaked, 2.5-9 mm, sometimes stipitate-glandular, lobes lanceolate, margins thin; petals 5, corolla yellow, sometimes with reddish base, not streaked, rotate, 5-12 mm, lobes with margins sometimes slightly erose apically, apex mucronate, stipitate-glandular adaxially; filaments connate to 0.3 mm, shorter than corolla; staminodes 1-2 mm. Capsules 5-7 mm, not punctate, glabrous. 2n = 34, 92, 96, 100, 108, 112. Flowering summer. Roadsides, moist meadows and prairies, moist woods, flood plains, stream banks, pond edges, high-tide lines; 0-1100 m; Alta., B.C., Man., N.B., N.S., Ont., P.E.I., Que., Sask.; Ala., Ark., Colo., Conn., Del., D.C., Fla., Ga., Idaho, Ill., Ind., Iowa, Kans., Ky., Maine, Md., Mass., Mich., Minn., Miss., Mo., Mont., Nebr., N.H., N.J., N.Mex., N.Y., N.C., N.Dak., Ohio, Okla., Oreg., Pa., R.I., S.C., S.Dak., Tenn., Utah, Vt., Va., Wash., W.Va., Wis., Wyo. V. J. Coffey and S. B. Jones (1980) indicated a population of Lysimachia ciliata in central Alaska without further locality data. This was probably an error; no records of this species from Alaska have been verified.
From Flora of Indiana (1940) by Charles C. Deam
Frequent to abundant in swampy woodland, wet prairies, wet borders of streams, and wet roadsides.
Erect, 4-13 dm, rhizomatous; lvs ovate to lanceolate, 4-14 נ1.5-6 cm, the base rounded (or even subcordate) or obtuse to cuneate, the petiole 0.5-5 cm, evidently ciliate its whole length; fls solitary in the upper axils, on pedicels 1.5-6.5 cm; cal-lobes 3.5-9 נ1.5-4.5 mm, with 3-5 parallel often reddish-brown veins; cor-lobes 5-12 נ3-9 mm; stamens distinct; staminodes linear or subulate; 2n=34, 92, 96, 100, 108, 112. Moist or wet low ground, in shade or sun; N.S. and Que. to B.C. and Alas., s. to Ga., La., N.M., and Oreg. May-Sept. (Steironema c.)
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.