Perennial herbs with creeping stolons. Leaves 3-ranked, flat, linear, with long tubular sheaths and dorsiventrally compressed blades; Inflorescence paniculate, consisting of several remote corymbiform partial panicles; Stamens 2 (according to several authors sometimes 3), with free filaments and linear anthers;
N. America present, tropical and temperate regions of the whole world present
Only 2 spp., one extending over the tropical and temperate regions of the whole world, the other, C. mariscoides (MUHL.) TORR., restricted to N. America.