Although present in North America since 1895, this short annual has been extensively documented only during recent decades. In Ohio it is widely known, especially at fair grounds and similar places (A. Cusick, pers. comm.). In Ky. Sclerochloa has been recently found in heavily trampled athletic fields and similar areas (Brandenburg & Thieret 1996), often with Poa annua and other annuals (all aliens except P. chapmanniana and Veronica peregrina).