You searched for: Institution University of Michigan. Libraries Remove constraint Institution: University of Michigan. Libraries Place Bois D'Arc Conservation Area, 4 mi. WSW of Willard and 10 mi. WNW of Springfield. Along service road at Farm Rd. 94 between Farm Rd. 53 and Farm Rd. 61. Remove constraint Place: Bois D'Arc Conservation Area, 4 mi. WSW of Willard and 10 mi. WNW of Springfield. Along service road at Farm Rd. 94 between Farm Rd. 53 and Farm Rd. 61. Topic Acalypha Remove constraint Topic: Acalypha