Echinochloa crus-galli (L.) Beauv

Group: Monocot
Family: Poaceae
Growth Habit: Graminoid
Duration: Annual

More commonly known as Barnyardgrass.
This plant is considered to be an invasive species.
Echinochloa Crus-Galli can be found in the following states:
ArkansasMissouri
CaliforniaNew Hampshire
ConnecticutNorth Carolina
GeorgiaNorth Dakota
IllinoisRhode Island
IowaSouth Carolina
KansasSouth Dakota
KentuckyVermont
MaineVirginia
MassachusettsWest Virginia
Michigan 
Uses
A warm-season bunchgrass used as cattle fodder and sometimes cultivated for this purpose. Also suited for ensilage, but not for hay. Usually fed green. Grass also used for reclamation of saline and alkaline areas, especially in Egypt. Grain of some varieties used as food in times of scarcity and sometimes used for adulterating fennel.

Toxicity
This grass has been reported to accumulate levels of nitrate in its tissues high enough to be toxic to farm animals (Holm et al., 1977).
http://www.hort.purdue.edu/newcrop/duke_energy/Echinochloa_crusgalli.html

*no image link provided.

Echinochloa Crus-Galli (L.) Beauv.
Barnyard Grass.
A coarse annual with ascending shoots, found in gardens and waste places.
LEAVES rolled in a flattened bud-shoot.
SHEATH flattened, keeled, split with hyaline margins, smooth, glabrous, pale green.
COLLAR broad,continuous, glabrous, yellowish green.
AURICLES absent.
LIGULE absent.
BLADE 8 to 15 mm. wide, 10 to 30 cm. long, flat or V-shaped, glabrous, pale or yellowish green, keeled below; margins smooth or scabrous.
http://www.agr.gc.ca/cal/epub/762e/7620019_e.html

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