Key to Michigan's Natural Communities

A. Occurring in floodplains of 3rd order or greater streams and rivers. Dominant overstory species include silver maple, red ash, black willow (Salix nigra), cottonwood (Populus deltoides), basswood, swamp white oak, bur oak, shagbark hickory, sycamore (Platanus occidentalis), and hackberry (Celtis occidentalis). Where organic soil accumulates in areas such as groundwater seepages, backswamps, and meander scars, tree species may include black ash, yellow birch, red maple, and conifers (tamarack, northern white-cedar, white pine, and hemlock), especially north of the tension zone .... Floodplain Forest

B. Occurring along headwater streams (1st and 2nd orders), and on poorly drained glacial outwash, lakeplain, and/or depressions in moraines or ice-contact topography. .... Continue

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