- Amygdaloid I., NW side of, Isle Royale1
- Apache1
- Arizona1
- Banff National Park, east shore of Upper Altrude Lake1
- Bella Coola River1
- Big Susie Island, Susie Islands1
- Bond Falls, Porcupine Mountains1
- Bryants - Douglas Lake1
- Cape Breton Island, Cape Breton Highlands National Park, Mary Ann Falls1
- Cattaraugus1
- Central America region1
- Chase S. Osborn Preserve of the University of Michigan, Sugar Island1
- Chippewa Park, vicinity of Tourist Park on Thunder Bay Harbour1
- Clallam1
- Cliff Mine, near1
- Cliff River, along1
- Clinton1
- Columbia-Shuswap1
- Connecticut1
- Contact UM Herbarium1