You searched for: Place Alcona Twp. one mi. N.W. of Black Riv. Rd intersection about three mi. inland from shore of L. Huron ca. 16 mi. S. of Alpena. Remove constraint Place: Alcona Twp. one mi. N.W. of Black Riv. Rd intersection about three mi. inland from shore of L. Huron ca. 16 mi. S. of Alpena. Topic Poaceae Remove constraint Topic: Poaceae