Environmental Description:  This community occurs in depressional wetlands with peaty soils in central and south Florida. At least one area where this type is found is underlain by an impermeable layer of sandy clay. These marshes occur where water depth is between 0.3 and 1 m, and hydroperiod extends more than 200 days per year. It is somewhat intermediate in hydrology among other inland freshwater marshes of Florida as suggested by the basic tolerance of the nominals; Pontederia cordata (pickerelweed) is more dependent upon continually wet conditions, while maidencane cannot tolerate long-term flooding (Kushlan 1990).