Soil: Saturated or nearly saturated during most of the growing season
Hydrology: Usually without standing water during most of the growing season but waterlogged within at least a few inches of the surface
Vegetation: Grasses, sedges, rushes, various broad-leaved plants
Common sites: May fill shallow basins, sloughs, or farmland sags; may border shallow marshes on the landward side and include low prairies, sedge meadows, and calcareous fens