OLYRA, in botany: A genus of the triandria order, belonging to the nucia class of plants; and in the natural method ranking under the 4th order, Gramina. The male calyx is a biflorous and aristated glume; the corolla a beardless glume; the female calyx is an uniflorous, patulous, and ovate glume; the style is bifid, and the seed cartilaginous.