Low herbs with opposite 3-5-ribbed leaves. Calyx-tube adherent to the ovary, the limb 4 cleft. Petals 4, showy, convolute in the bud. Stamens 8, with 1-celled anthers opening by a pore at the apex; these and the petals inserted on the calyx. Style and stigma 1. Pod 4-celled, many-seeded; seeds coiled. The only representative with us is Rhexia L. Deer-Grass. Meadow-Beauty. R. Virgin'ica, L. Stem square, wing-angled. Leaves oval-lanceolate. Petals purple. - Shores of the Muskoka Lakes.