You searched for: Institution University of Michigan. Libraries Remove constraint Institution: University of Michigan. Libraries Place Alcona Remove constraint Place: Alcona Place On N.E. side of Swamp Rd. near creek crossing in swamp about .8 mi. N.W. of village of Harrisville. Harrisville Twp. Remove constraint Place: On N.E. side of Swamp Rd. near creek crossing in swamp about .8 mi. N.W. of village of Harrisville. Harrisville Twp. Topic Cyperaceae Remove constraint Topic: Cyperaceae