Stem simple to the infl, erect, 1-4 dm; lf- scales usually opposite; infl racemose or paniculate, the branches and pedicels commonly opposite and erect; fls 3-4 mm; sep lance-subulate; pet oblong, usually denticulate, abruptly narrowed to a rounded or obtuse, often mucronate tip; anthers minutely apiculate; 2n=52. Sphagnum bogs and wet meadows; Que. and N.S. to Wis., s. to Fla. and La. Late summer.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.