Echinochloa is derived from echinus meaning hedge-hog and chloa means grass. Crus means a leg, galli means of a cock.
According to the Rules of ICBN the names of the families should end in -aceae. Thus the new name for the family Gramineae became Poaceae. However, the name Gramineae is also exempted and conserved under ''NominaConservanda' because of their constant use for a long time.