Flyaway grass \Flyaway grass\ (Bot.) The hair grass ({Agrostis scabra}). So called from its light panicle, which is blown to great distances by the wind. [Webster 1913 Suppl.]
Hair grass \Hair" grass`\ (gr[.a]s`). (Bot.) A grass with very slender leaves or branches; as the {Agrostis scabra}, and several species of {Aira} or {Deschampsia}. [1913 Webster]