Plants annual; tufted. Culms (10) 40-85 cm, erect. Ligules 2-6 mm, obtuse; blades (2) 3.5-6 mm wide; upper sheaths somewhat inflated. Panicles 4-12 cm long, 3-7 mm wide. Glumes 4.5-7.5 mm, connate in the lower 1/2, coriaceous, sides glabrous, keels winged, ciliate, scabrous distally, lateral-veins ciliate or glabrous proximally, apices acute, convergent to parallel; lemmas 4-7 mm, connate in the lower 1/3-1/2, glabrous, apices acute, awns to 12 mm, geniculate, exceeding the lemmas by 3-6 mm; anthers 2.4-4.1 mm, yellow. 2n = 14, 28.
Wash., Del., D.C., W.Va., N.J., N.Mex., Tex., La., N.C., S.C., Pa., N.Y., Va., Calif., Ala., Oreg., Maine, Md., Mass., Ohio, Man., Mich., R.I., Kans., Miss., Ky.
Alopecurus myosuroides is native to Eurasia, and grows in moist meadows, deciduous forests, and cultivated or disturbed ground. A significant weed species in temperate cereal crops, it is one of the most damaging weeds of winter cereals in England. It has been introduced repeatedly as a weed of cultivation into many parts of the Flora region, but apparently has not spread to a large degree outside of cultivation. Alopecurus myosuroides has been listed as a noxious weed in the state of Washington, one of the states where winter wheat is a major crop.
"decumbent" is not a number.