You searched for: Institution University of Michigan. Libraries Remove constraint Institution: University of Michigan. Libraries 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 Sporobolus Remove constraint Topic: Sporobolus