''Echinochloa oryzoides'' is a species of
grass
Poaceae ( ), also called Gramineae ( ), is a large and nearly ubiquitous family (biology), family of monocotyledonous flowering plants commonly known as grasses. It includes the cereal grasses, bamboos, the grasses of natural grassland and spe ...
known by the common name early barnyard grass. Its origin is not certain but it may be Eurasia. The grass is a major
weed
A weed is a plant considered undesirable in a particular situation, growing where it conflicts with human preferences, needs, or goals.Harlan, J. R., & deWet, J. M. (1965). Some thoughts about weeds. ''Economic botany'', ''19''(1), 16-24. Pla ...
of
rice paddies; it is a serious problem as it is an effective
Vavilovian mimic of rice, very difficult to separate from the crop.
References
External links
Jepson Manual TreatmentUSDA Plants ProfileGrass Manual Profile
oryzoides
Cereals
Taxa named by Karl Fritsch
{{Panicoideae-stub