Setaria glauca (L.) P.Beauv.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
Species Description - Annual 3–13 dm, usually erect, often in large tufts; sheaths glabrous; blades loosely twisted, to 30 cm, 4–10 mm wide, scabrous above and with long papillose hairs near the throat, glabrous beneath; infl stiffly erect, cylindric, (3–)5–10(–15) cm, yellowish, the axis hispid; bristles 4–12 below each spikelet, 3–8 mm, antrorsely scabrous; spikelets 3–3.5 mm; first glume 3-veined, a third as long as the spikelet, the second 5-veined, half as long as the spikelet; sterile lemma about equaling the fertile one, clasping a broad hyaline palea of equal length, sometimes staminate; fertile lemma transversely strongly rugulose; 2n=36, 72. Cult. soil and waste places; native of Europe, now a cosmopolitan weed, and abundant throughout our range. (S. lutescens; S. pumila)