Narrow fen at base of Quercus sp. Dominated upland. Water appears to seep out from base of upland and creates tranition/wooded fen zone at base. This occasionally gives way to high quality patches of fen, but much of the fen is overtaken by Lythrum salicaria and Typha spp. Area not likely to persist at prairie fen without management. Weedy area in middle of prairie fen; about 10m south of woodland upland; Typha angustifolia dominates area; other species include Lythrum salicaria, Campanula aparinoides, Carex sartwellii, Eupatorium perfoliatum, Apocynum cannabinum, and Phalaris arundinacea. Ground wet but not inundated.