Acidic Graminoid Fen

Photos: salicicola.com

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Overview

Mixed graminoid/herbaceous acidic peatlands that experience some groundwater and/or surface water flow but no calcareous seepage. Shrubs occur in clumps but are not dominant throughout.

Acidic graminoid fens are sedge/sphagnum-dominated peatlands that are weakly minerotrophic [mineral-rich]. Acidic graminoid fens typically have some surface water inflow and some groundwater connectivity. Inlets and outlets are usually present, and standing water is present throughout much of the growing season. Peat mats are quaking and often unstable. More information is needed on peat characteristics and hydrology.

Photos credit to salicicola.com (unless otherwise noted). Natural communities information extracted from the Massachusetts Division of Fisheries and Wildlife Natural Heritage and Endangered Species Program (NHESP). NHESP's Acidic Graminoid Fen natural community page.

SEMPBA Archives: Acidic Graminoid Fen

 

Species Name

sphagnum moss (Sphagnum spp.)
Virginia cotton grass (Eriophorum virginicum)
rought cotton grass (Eriophorum tenellum)

leatherleaf (Chamaedaphne calyculata)

water-willow (Decodon verticillatus)

beaked sedge (Carex utriculata)

slender woolly-fruited sedge (Carex lasiocarpa var. americana)

white beak-sedge (Rhynchospora alba)

twig-sedge (Cladium mariscoides)

pondshore-rush (Juncus pelocarpus)

three-way sedge (Dulichium arundinaceum)

buckbean (Menyanthes trifoliata)

marsh St. John's wort (Triadenum virginicum)

arrow-arum (Peltandra virginica)

rose pogonia (Pogonia ophioglossoides)

large cranberry (Vaccinium macrocarpon)

swamp azalea (Rhododendron viscosum)

sweet pepper-bush (Clethra alnifolia)

poison sumac (Toxicodendron vernix)

red maple (Acer rubrum)

white pine (Pinus strobus)

pitch pine (Pinus rigida)

Atlantic white cedar (Chamaecyparis thyoides)

 

sphagnum mosss--Sphagnum beneath Sceuschzeria palustris.
sphagnum mosss--Sphagnum beneath Sceuschzeria palustris.
sphagnum mosss--Sphagnum beneath Vaccinninum macrocarpon.
Virginia cotton grass (Eriophorum virginicum)
Virginia cotton grass (Eriophorum virginicum)
Virginia cotton grass (Eriophorum virginicum)
Virginia cotton grass (Eriophorum virginicum)
rough cotton grass (Eriophorum tenellum)
rough cotton grass (Eriophorum tenellum)
leatherleaf (Chamaedaphne calyculata)
leatherleaf (Chamaedaphne calyculata)
leatherleaf (Chamaedaphne calyculata)
leatherleaf (Chamaedaphne calyculata)
water-willow (Decodon verticillatus)

water-willow (Decodon verticillatus)

water-willow (Decodon verticillatus)
beaked sedge (Carex utriculata)
beaked sedge (Carex utriculata)
beaked sedge (Carex utriculata)
slender woolly-fruited sedge (Carex lasiocarpa var. americana)

slender woolly-fruited sedge (Carex lasiocarpa var. americana)

slender woolly-fruited sedge (Carex lasiocarpa var. americana)

slender woolly-fruited sedge (Carex lasiocarpavar. americana)

white beak-sedge (Rhynchospora alba)

white beak-sedge (Rhynchospora alba)
white beak-sedge (Rhynchospora alba)

twig-sedge (Cladium mariscoides)

twig-sedge (Cladium mariscoides)

twig-sedge (Cladium mariscoides)
pondshore-rush (Juncus pelocarpus)

pondshore-rush (Juncus pelocarpus)

pondshore-rush (Juncus pelocarpus)
three-way sedge (Dulichium arundinaceum)
three-way sedge (Dulichium arundinaceum)
three-way sedge (Dulichium arundinaceum)
three-way sedge (Dulichium arundinaceum)
buckbean (Menyanthes trifoliata)
buckbean (Menyanthes trifoliata)
buckbean (Menyanthes trifoliata)
buckbean (Menyanthes trifoliata)
marsh St. John's wort (Triadenum virginicum)
marsh St. John's wort (Triadenum virginicum)
marsh St. John's wort (Triadenum virginicum)
marsh St. John's wort (Triadenum virginicum)
arrow-arum (Peltandra virginica)
arrow-arum (Peltandra virginica)
arrow-arum (Peltandra virginica)
arrow-arum (Peltandra virginica)
rose pogonia (Pogonia ophioglossoides)
rose pogonia (Pogonia ophioglossoides)
rose pogonia (Pogonia ophioglossoides)

large cranberry (Vaccinium macrocarpon)

large cranberry (Vaccinium macrocarpon)
large cranberry (Vaccinium macrocarpon)
swamp azalea (Rhododendron viscosum)
swamp azalea (Rhododendron viscosum)
swamp azalea (Rhododendron viscosum)
swamp azalea (Rhododendron viscosum)
sweet pepper-bush (Clethra alnifolia)
sweet pepper-bush (Clethra alnifolia)

sweet pepper-bush (Clethra alnifolia)

sweet pepper-bush (Clethra alnifolia)
poison sumac (Toxicodendron vernix)
poison sumac (Toxicodendron vernix)
poison sumac (Toxicodendron vernix)
poison sumac (Toxicodendron vernix)
Red maple6 red maple (Acer rubrum)
Red maple7 red maple (Acer rubrum)
red maple (Acer rubrum)
white pine (Pinus strobus)
white pine (Pinus strobus)
white pine (Pinus strobus)
white pine (Pinus strobus)
pitch pine (Pinus rigida)
pitch pine (Pinus rigida)
pitch pine (Pinus rigida)
pitch pine (Pinus rigida)
Atlantic white cedar (Chamaecyparis thyoides)
Atlantic white cedar (Chamaecyparis thyoides)
Atlantic white cedar (Chamaecyparis thyoides)
Atlantic white cedar (Chamaecyparis thyoides)