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. Typha angustifolia dominated with abundant Lythrum salicaria; about 10m south of shrub line; Toxicodendron vernix common in shrub zone. Degraded prairie fen from Typha and shrubs.