I found this little blurb found
here.
Saunder’s Fen is a 17 ha wetland located along County Road 15 between Monticello and Monck.
According to the 1991 Management Plan, fens this size are scarce at this latitude. This fen is
important because it exhibits all three stages of a common fen: open areas dominated by sedges, shrub
dominated areas, and areas treed with tamarack and white cedar. Specific species include leatherleaf,
pitcher plant, Labrador tea, meadowsweet and dwarf birch. It is important to note that this fen has
been impacted by municipal drainage and the fen characteristics have changed.
I would start looking
here