Echinochloa crus-galli is a type of wild grass originating from tropical Asia that was formerly classified as a type of panicum grass. It is commonly known as
cockspur (or
cockspur grass),
barnyard millet,
Japanese millet,
water grass,
common barnyard grass, or simply
"barnyard grass" (which may refer to any species of
Echinochloa or the genus as a whole however). This plant can grow to 60" (1.5 m) in height and has long, flat
(Wikipedia)