Alopecurus aequalis Sobol.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
Species Description - Annual or short-lived perennial 2–5 dm; culms very slender, erect or decumbent at base, solitary or in small tufts; infl slender, 2–8 cm × 3–5 mm, scarcely tapering; glumes 2–2.7 mm, connate near the base, blunt and scarious at the tip, villous-ciliate on the keel; awn attached just below midlength of the lemma, straight, equaling the glumes or exsert to 0.5(–1) mm; anthers 0.5–1 mm; 2n=14. In mud or shallow water; circumboreal, s. to N.J., Ind., Mo., and Calif.