![]() *(DCNR 1999, Stone 2006) Similar Ecological Communities WM : Red Maple – Mixed Shrub Palustrine Woodland North-Central Appalachian Acidic Swamp (CES202.604)Ĭentral Appalachian Stream and Riparian (CES202.609) Northern Appalachian-Acadian Conifer-Hardwood Acidic Swamp (CES201.574) Southern New England / Northern Piedmont Red Maple Seepage Swamp (CEGL006406) International Vegetation Classification Associations: USNVC Crosswalk: Bryophyte nomenclature follows Crum and Anderson (1981). Vascular plant nomenclature follows Rhoads and Block (2007). * limited to sites with higher soil calcium Have standing water between the hummocks for most of the year with wapato ( Sagittaria latifolia), bur-reed ( Sparganium americanum), and other emergent aquatic plants.Shrub layer is extremely dense with shrubs growing on hummocks, including silky dogwood ( Cornus amomum), winterberry ( Ilex verticillata), spicebush ( Lindera benzoin), smooth alder ( Alnus serrulata), silky willow ( Salix sericea), swamp rose ( Rosa palustris), and buttonbush ( Cephalanthus occidentalis).Tree cover between 10 and 60%, dominated by red maple ( Acer rubrum) and usually less than 30 feet tall.Other herbs include skunk-cabbage ( Symplocarpus foetidus),īeggar-ticks ( Bidens spp.), jewelweed ( Impatiens capensis), and in wetter areas, arrow-arum ( Peltandra virginica), wapato ( Sagittaria latifolia), and marsh-marigold ( Caltha palustris).Ĭommon, widespread, and abundant in the nation or state. Characteristic species include marsh fern ( Thelypteris palustris), cinnamon fern ( Osmunda cinnamomea), sensitive fern ( Onoclea sensibilis), crested wood fern ( Dryopteris cristata), and royal fern ( Osmunda regalis). Ferns usually dominate the herbaceous layer. The shrub layer is typically dense and includes silky dogwood ( Cornus amomum), winterberry ( Ilex verticillata), spicebush ( Lindera benzoin), smooth alder ( Alnus serrulata), silky willow ( Salix sericea), swamp rose ( Rosa palustris), and buttonbush ( Cephalanthus occidentalis). palustris), and black ash ( Fraxinus nigra). Red maple ( Acer rubrum) dominates the canopy, sometimes with a mixture of other trees such as blackgum ( Nyssa sylvatica), Eastern hemlock ( Tsuga canadensis), eastern white pine ( Pinus strobus), black willow ( Salix nigra), swamp white oak ( Quercus bicolor), pin oak ( Q. Trees are sparse (10-60% cover) and generally less than 30 feet tall. The pH is somewhat acidic to circumneutral. This community type usually occurs on mineral soil with a thin layer of muck.
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