Plants for Very Wet Area of Yard?

I live in central Wisconsin about 40 miles west of Oshkosh. I have an area in my yard that when the snow melts or we have excessive rain it floods. In the spring, it can take two months or more before the area dries out. It is wet much longer than a typical rain garden because the water table is really high. Is there anything I can plant in this area that can withstand wet feet for that long?

By Gerald W. from Wautoma, WI