Coffey Swamp is a freshwater swamp located on the northern edge of Washington Island, in Door County Wisconsin and is a designated state natural area since 1994. At the center of the swamp is a small, shallow pond.Flora and Vegetation of the Grand Traverse Islands (Lake Michigan), Wisconsin and Michigan by Emmet J. Judziewicz, The Michigan Botanist, Volume 40, Number 4, October 2001, page 133
The swamp represents a boreal forest, and hosts a number of plant species including various sedges, ferns and other rare plants. Snowberry, round-leaved sundew, and pitcher plants grow in small mounded areas of sphagnum moss under some of the cedars.
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