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The Collaborative International Dictionary
red darnel

Ray grass \Ray" grass`\ (r[=a]" gr[.a]s`). [Etymol. of ray is uncertain.] (Bot.) A perennial European grass ( Lolium perenne); -- called also rye grass, and red darnel. See Darnel, and Grass.

Italian ray grass or Italian rye grass. See Darnel, and Grass.