1) Fen 1) Mossy marsh 2) Swamp or bog 
Muskeg is an acidic soil type common in Arctic and boreal areas, although it is found in other northern climates as well. Muskeg is approximately synonymous with bogland, but muskeg is the standard term in Western Canada and Alaska, while `bog` is common elsewhere. The term became common in these areas because it is of Cree origin; maskek (ᒪ
1. a bog characterized by scattered and stunted evergreens. 2. broadly, any area of wetland vegetation (Morris 1992).
Habitat characterized by an acidic, very moist soil type common in Arctic and boreal areas that is made up of dead plants in various states of decomposition and often includes sphagnum moss and sedge peat; often found along the uneven interface of taiga and tundra, where there are few and stunted trees.
Poorly drained marshes or swamps found overlying permafrost.
a bog of northern North America, commonly having sphagnum mosses, sedge, and sometimes stunted black spruce and tamarack trees.