You searched for: Place frequent in creek near its mouth on SW side of Black River, sec. 27, Benton Tp., ca. 1-1/2 mi. NW of Alverno. Remove constraint Place: frequent in creek near its mouth on SW side of Black River, sec. 27, Benton Tp., ca. 1-1/2 mi. NW of Alverno. Topic Potamogeton Remove constraint Topic: Potamogeton