Lysimachia stricta Aiton var. producta A. Gray, Manual ed. 2, 272. 1856; L. foliosa Small; L. polyantha Fernald

Stems erect, simple to branched distally, 4-10 dm, usually glabrous (rarely stipitate-glandular at nodes); rhizomes slender to thickened; bulblets absent. Leaves whorled or opposite; petiole absent or 0.1-3 cm, eciliate; blade elliptic to lanceolate or ovate, 4-8 × 1.5-2.5 cm, base cuneate, decurrent, margins entire, slightly revolute, eciliolate, apex acute to acuminate, surfaces punctate, glabrous; venation single-veined to obscurely pinnate. Inflorescences terminal, racemes (sometimes leafy), 20-35 cm. Pedicels 1.5-3 cm, glabrous or sparsely stipitate-glandular. Flowers: sepals 5, calyx streaked with black resin canals, 3-7 mm, stipitate-glandular, especially near margins, lobes lanceolate, margins thin; petals 5, corolla yellow, streaked with reddish or reddish-black resin canals, rotate, 5-8 mm, lobes with margins entire, apex rounded to obtuse, stipitate-glandular abaxially; filaments connate 1.7-3 mm, shorter than corolla; staminodes absent. Capsules 3-5 mm, dark-punctate, glabrous. 2n = 84.

Flowering summer. Moist, open woods, swamp and pond margins, wet, sandy fields; 0-1500 m; Ont., Que.; Conn., Del., D.C., Ill., Ind., Ky., Maine, Md., Mass., Mich., N.H., N.J., N.Y., N.C., Ohio, Pa., R.I., S.C., Tenn., Vt., Va., W.Va., Wis.

Lysimachia ×producta is a fertile hybrid between L. quadrifolia and L. terrestris, occurring as isolated populations or with one or both parents present.

SELECTED REFERENCES Cooperrider, T. S. and B. L. Brockett. 1974. The nature and status of Lysimachia ×producta (Primulaceae). Brittonia 26: 119-128. Cooperrider, T. S. and B. L. Brockett. 1976. The nature and status of Lysimachia ×producta (Primulaceae)--II. Brittonia 28: 76-80.