Annual 2-9 dm; culms very slender, solitary or tufted, erect or spreading; blades thin, 5-15 cm נ5-10 mm, narrowed to the base, glabrous; panicle very lax and diffuse, 5-20 cm, its very slender branches widely spreading; spikelets narrowly obovoid, acute, 1.7-2.1 mm; first glume triangular, 0.5-0.8 mm; second glume and sterile lemma obscurely veined, distinctly verrucose; 2n=36. Wet woods and shores; e. Mass. to Fla. and Tex., mostly on the coastal plain, and also inland in Tenn., Ky., O., ne. Ind., and sw. Mich.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.