- Brunel Twp., Huntsville II Hwy. 11, 1.0 mile south southern exit Huntsville, east side•, Stand 21871
- Burlington, Crawford Lake, Milton Outlier Valley ANSI1
- Byron Bog, London2
- Canada245
- Canfield Twp., across from Grey Goose Island on east side of Moose River, site #7-332
- Canisbay Twp., Algonquin Provincial Park, 50 m north of Highway 60 south of gravel pit, Canisbay Lake1
- Caribou Island1
- Carleton1
- Carribou Island1
- Chain of Lakes 12.1 S. F. P&P Rd. S. Moonbeam, W. Side, 0.1 mi. S. 12 mi. post., Casselman Twp., Stand 21752
- Chinguacousy1
- Chinguacousy Twp., Niagara Escarpment areas of natural and scientific interest, Peel1
- Christie Twp., 4 km west of Orrville1
- Cloche Mountains1
- Cochrane27
- Cockburn Island, near Boom Point1
- Contact UM Herbarium3
- Drummond Twp., Blueberry Marsh, 4 km northwest of Perth1
- Dufferin4
- Dummer Twp., 4.7 km northeast of Warsaw Caves, southeast of transmission line1