water-grass
Water grass. (a) A tall march perennial grass (Paspalum dilatatum) of the southern United States and the American tropics. (b) Manna grass. (c) The grass Chloris elegans. (d) [Dial. Eng.] (1) Velvet grass. (2) Defn: The water cress. (3) Defn: One of various horsetails.