Alopecurus carolinianus Walter
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
Species Description - Densely tufted annual 1–6 dm, erect or ascending to rarely decumbent at base; infl cylindric, 2–5 cm × 4–5 mm; spikelets 2–2.4 mm; glumes connate only at the base, scarious and erose at the blunt tip, villous-ciliate on the keel, ± villous on the sides and base; awn attached halfway between the base and the middle of the lemma, ± geniculate, exserted 1.5–3 mm; anthers 0.3–0.7 mm; 2n=14. Wet soil; Mass. to Minn., s. to Fla. and Tex., and w. to the Pacific.