Slender annual 2–8 dm; blades 1–2 mm wide, shorter than their sheaths, the upper much reduced; terminal infl 2–8 cm, with a few branches each bearing a few 2–5-fld purple spikelets; glumes narrowly lanceolate, 2–4 mm; lemmas 3–4 mm, the short lobes rounded or erose, the hairy awn 1 cm or less; rachilla-joints half as long as the lemma; included panicles and solitary spikelets produced within the lower sheaths. Dry sand along the coast from N.H. to Tex.; also along the shores of the Great Lakes, and in the interior from Ind. to Minn., Colo., and Tex.