- Bois Blanc Island1
- Ca. 1.5 miles north of Black River near Lake Huron1
- Calhoun1
- Cass1
- Cass Lake1
- Centreville1
- Chase S. Osborn Preserve of the University of Michigan, near the southern end of Sugar Island,1
- Chihuahua1
- Colfax Twp. Sec.12 NW1/4, T15N, R9W Wilson Rd at 125th Ave about 0.125 mi north.1
- Constantine Twp.; T7S, R12W, Sec. 71
- Copper Harbor1
- Decatur1
- Dexter Twp. sec. 4-5 Pinckney Recreation Area, near Crooked Lake.1
- Dexter Twp., Sect. 5, east side,1
- Dickinson1
- Dorud1
- Dorud, Province of Luristan1
- Dry gravelly banks near Guadalajara1
- E side of Munising.1
- E.S. George Reserve. Grid E-13.1