Natural Communities of NH -- Photo Guide

Inland Atlantic white cedar swamp  (S1)



Inland Atlantic white cedar swamps
occur more than 30 miles from the coast, at elevations greater than 500 ft. (up to around 1,000 ft.). The community is characterized by the presence of numerous northern species not found in other Atlantic white cedar swamp types, such as red spruce, bluebead lily, and creeping snowberry, and by the absence of several coastal and southern species. Hummock and hollow topography is pronounced and hollows are often wet throughout the growing season. Soil pH ranges from superacid to mediacid (3.4 to 4.8).

Characteristic Vegetation: Atlantic white cedar (Chamaecyparis thyoides) is the dominant tree in the canopy. Red spruce (Picea rubens) is abundant at most sites, along with frequent bluebead lily (Clintonia borealis) and creeping snowberry (Gaultheria hispidula). Other less frequent but reasonably diagnostic species include bunchberry (Cornus canadensis), balsam fir (Abies balsamea), eastern larch (Larix laricina), black spruce (Picea mariana), and black huckleberry (Gaylussacia baccata). Three-seeded sedge (Carex trisperma) and sheep laurel (Kalmia angustifolia) are frequent and abundant. Hemlock (Tsuga canadensis) is only occasionally present, but may form locally significant cover.

Coastal and southern species common in some other cedar communities are absent in this type; these include sweet pepperbush (Clethra alnifolia), skunk cabbage (Symplocarpus foetidus), and Massachusetts fern (Thelypteris simulata).


Good examples of this community occur at Bradford Bog (Bradford), Cooper Cedar Woods (New Durham), and Loverens Mill Preserve (Antrim).

Inland Atlantic white cedar swamps sometimes occur as part of larger coastal conifer peat swamp systems.


Inland Atlantic white cedar swamp at Loverens Mill Cedar Swamp Preserve (photo by Ben Kimball for the NH Natural Heritage Bureau)
Inland Atlantic white cedar swamp at Loverens Mill Cedar Swamp Preserve (photo by Ben Kimball)

Inland Atlantic white cedar swamp at Bradford Bog (photo by Ben Kimball for the NH Natural Heritage Bureau)
Inland Atlantic white cedar swamp at Bradford Bog (photo by Ben Kimball)

Inland Atlantic white cedar swamp at Loverens Mill Cedar Swamp Preserve (photo by Ben Kimball)
inland Atlantic white cedar swamp at Loverens Mill Cedar Swamp Preserve (photo by Ben Kimball)

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