- Reed's Lake [Grand Rapids]1
- Rensselaer1
- Riverbrink Park, Ypsilanti1
- Rocky (limestone) hills above dam at foot of Devils Lake, about 20 mi. NNW of Del Rio1
- Roscommon1
- Sec 2 T49N-R29W North of Wildcat Canyon1
- Seney National Wildlife Refuge, at NE end of C3 Pool.1
- Sierra Madre Oriental, San Francisco Cañon, about 15 mi. SW of Pueblo Galeana1
- South Manitou Island, off road east of the south end of Lake Florence.1
- South of Burt Lake.1
- St. Helena Island1
- T23N, R5W, Sec. 35. Muskegon River Basin.1
- Takubama, Naga Hills1
- Troy [Coordinates are for Prospect Park.]1
- Union Lake1
- University of Michigan Botanical Gardens, Dixboro Site, 4.5 mi northeast of Ann Arbor1
- University of Michigan Botanical Gardens, Dixboro Site, 4.5 mi. northeast of Ann Arbor. Roadside Cattail area.1
- Upper Mississippi, 200 miles above Falls of St. Anthony1
- Uttarakhand [Uttaranchal]1
- Val Verde1