Cedar glades occur where limestone bedrock occurs near or at the surface.Trees are unable to grow except for eastern red cedar (Juniperus virginiana) which can survive in small cracks and depressions. Fire suppression allows hill prairies to succeed to glade.
Sedge meadow is an open wetland community typically dominated by tussock sedge (Carex stricta) and bluejoint reed (Calamagrostis canadensis). Many sedge meadows are fed by alkaline groundwater and occur in complexes with marsh, fen, and wet prairie. In the absence of fire, shrubs and trees are readily able to encroach.