ZIZANIA, in botany; a genus of plants of the class monocotyledon, order hexandria; and in the natural system arranged under the 4th order, Graminae. There is no male calyx; the corolla is a bivalved, bearded glume, intermixed with the female flowers; there is no female calyx, the corolla is an univalved, cucullated, and aristated glume; the style is bipartite, and there is one seed covered with the plaited corolla. There are three species; the aquatica, the pulchra, and terrestris, none of which are natives of Britain.