Place
- Burnihat, Khasi Hills2
- Ca. 8 miles north of Ludington, in state park near Big Sable L. H.1
- Campeche1
- Canada45
- Cass2
- Cedar Creek Twsp.1
- Charlevoix3
- Cheboygan3
- Chhattisgarh3
- Chiapas1
- City of Menominee3
- Clinton2
- Coatzacoalcos, isthmus of Tehnantepec, State of Vera Cruz1
- Contact UM Herbarium293
- Crawford1
- Cuba1
- Córdoba1
- Dabbeji [Dabbyi?]1
- Danburry Twp., palustrine sand plain community along depression along eastern side of Peninsula near southern tip; Sandusky Quad1
- E beach of Silver Lake, ca. 6 1/2 miles NW of Dexter.1