

WI 5. Endeavor Marsh and Ladyslipper Island (Summerton Bog). Acreage: 40. 



Location: Marquette County; Oxford and Briggsville quadrangles; 3 miles N of 

 Endeavor; reached via Rt. 51, 3 miles N, then W on D 1.5 miles; take side road 

 1.5 miles SW to the Marsh. 



Description: Water table differences of 4 ft across the island contribute per- 

 manent springs on the lower side. Rare orchids are present. Oak Island in the 

 marsh is an unusual example of till left in an ice crack. There are 30 acres of 

 marsh, part of it a nonacid peat, or fen, and 10 acres of upland oak opening on 

 the island with prairie plants. 



Ownership: TNC. 



Data source: Orie L. Loucks, Botany Department, University of Wisconsin, 

 Madison, Wis. 53706. 



Other knowledgeable persons: James Zimmerman, Arboretum, University of 

 Wisconsin, Madison, Wis. 53706. 



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