Barnyardgrass (Echinochloa crus-galli)

Barnyardgrass (Echinochloa crus-galli) is a species of plant in the Poaceae, herbaceous, mostly erect stem, up to 1.5 m high, ribbon leaves often purplish at base. Most stems are erect but some will spread over the ground, producing up to 40,000 seeds per year.

E. crus-galli has stems erect to stooped, tall, often thin and branched at the base. The leaves are ribbon-shaped, flat, glabrous, 30-50 cm long, 1-2 cm wide, scaly and slightly thickened at the edges. The sheath is smooth and often reddish.

Panicle 8-30 cm long, green or purple, prominent, slightly nodding, tightly branched, 5 cm long and erect. The spines are 3-4 mm long, densely arranged on the branches, ovate, often long-stemmed, pale green to dull purple and short hairs along the veins.

Racemes spreading, 10 cm long and sometimes branched. The glume and lower lemma are finely haired on the surface with stiffer hairs in the veins.

The first glume is about two-fifths along the spikelet, deltoid, the second glume is along the spikelet, short-awned. The sterile lemma is webbed with straight scabrous awns, 2-4 cm long or without awn. The lemma is fertile ovate-elliptic, pointed, pale yellow, shiny, smooth, 3-3.5 mm long.

Kingdom: Plantae
Phylum: Tracheophyta
Subphylum: Angiospermae
Class: Liliopsida
Order: Poales
Family: Poaceae
Subfamily: Panicoideae
Tribe: Paniceae
Subtribe: Boivinellinae
Genus: Echinochloa
Species: Echinochloa crus-galli
Subspecies: Echinochloa crus-galli ssp. spiralis
Varieties: Echinochloa crus-galli var. crus-galli

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