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) The water cress. (3) One of various horsetails.
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Paspalum dilatatum
n : tall tufted perennial tropical American grass naturalized as
pasture and forage grass in southern United States [syn:
dallisgrass, dallis grass, paspalum]