A peatland dominated by low-growing evergreen ericaceous (heath-like) shrubs and peat mosses. The surface of the peatland has small mounds and depressions called hummocks and hollows. These bogs have more than 50% cover of low-growing shrubs, and the hummocks tend to have a higher abundance of shrubs than the hollows. Water is usually nutrient-poor and acidic. The dominant shrub is often leatherleaf (Chamaedaphne calyculata), which may make up more than 50% of the total vegetation cover. Shrubs are typically 1 m or less in height, and are taller than the herbs.

A peatland dominated by dwarf evergreen shrubs (>50% cover), such as leatherleaf (Chamaedaphne calyculata).

Known examples of this community have been found at elevations between 250 feet and 1840 feet.