Stems simple or sparingly branched, erect, smooth, 1 to 31/2 feet high. Leaves opposite, thin, ovate to ovate-lanceolate, sharp pointed at the apex, blunt to slightly heart-shaped at the base, 2 to 6 inches long, one-half to 3 inches wide, the margins and short petioles hairy. Flowers one-half to 1 inch broad, on slender stalks in the upper axils; lobes of the calyx lanceolate and sharp pointed, shorter than the five yellow segments of the corolla, which are finely toothed toward their tips; stamens five. Fruit a five-valved capsule, slightly longer than the calyx.
In moist thickets and open woods, Nova Scotia to British Columbia, south to Georgia, Kansas and Arizona. Flowering from June to August.
Memoir 15 N. Y. State Museum
Fringed Loosestrife - Steironema ciliatum