Echinochloa crusgalli var. frumentacea (Link) W.Wight
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
Variety Description - Panicle-branches appressed or only slightly spreading, densely fld, with closely crowded, plump, awnless or only shortly awn-tipped, usually grayish-purple spikelets; plants relatively large and coarse, 7–15 dm, the lvs mostly 15–30 mm wide. (E. frumentacea) Cultigen from se. Asia, occasionally cult. with us for forage, sometimes escaped, but not persistent.