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WIDNR - Poor Fen

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WIDNR

Citation: Epstein, E.E. Natural communities, aquatic features, and selected habitats of Wisconsin. Chapter 7 in The ecological land- scapes of Wisconsin: An assessment of ecological resources and a guide to planning sustainable management. Wisconsin Department of Natural Resources, PUB-SS-1131H 2017, Madison.

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Locality: Wisconsin

Abstract:

According to The Ecological Landscapes of Wisconsin (2017), "Poor Fen is a weakly minerotrophic, herb-dominated acid peatland community that is widespread north of the Tension Zone. The moisture regime is saturated. Poor Fen can be differentiated from Open Bog by water chemistry, especially somewhat higher pH levels and slightly greater nutrient availability; direct contact with ground or surface waters; and floristics (Crum 1988)."

The peat-forming Sphagnum mosses are dominant in poor fens.

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Families: 18

Genera: 31

Species: 43

Total Taxa: 43 (including subsp. and var.)

AQUIFOLIACEAE

Ilex mucronata - mountain holly

ASTERACEAE

Solidago uliginosa - northern bog goldenrod

Symphyotrichum boreale - slender white bog aster

BETULACEAE

Alnus incana subsp. rugosa - swamp alder

Betula pumila - swamp birch

CYPERACEAE

Carex chordorrhiza - creeping sedge

Carex lasiocarpa - fen wiregrass sedge

Carex livida - pale stiff sedge

Carex michauxiana - Michaux's sedge

Carex oligosperma - few-seeded sedge

Carex utriculata - Northwest Territory sedge

Eriophorum russeolum subsp. leiocarpum - red cottongrass

Eriophorum virginicum - tawny cotton-grass

Rhynchospora alba - white beak-rush

Trichophorum alpinum - alpine club-rush

DROSERACEAE

Drosera intermedia - spoon-leaf sundew

Drosera rotundifolia - round-leaved sundew

ERICACEAE

Andromeda polifolia var. latifolia - bog rosemary

Chamaedaphne calyculata - leather-leaf

Gaylussacia baccata - huckleberry

Kalmia polifolia - swamp laurel

Rhododendron groenlandicum - Labrador-tea

Vaccinium macrocarpon - large cranberry

HYPERICACEAE

Triadenum fraseri - Fraser's marsh St. John's-wort

JUNCAGINACEAE

Triglochin maritima - seaside arrow-grass

LENTIBULARIACEAE

Utricularia cornuta - naked bladderwort

Utricularia intermedia - northern bladderwort

Utricularia minor - small bladderwort

MENYANTHACEAE

Menyanthes trifoliata - common buckbean

MYRICACEAE

Myrica gale - sweet gale

ONAGRACEAE

Epilobium leptophyllum - fen willow-herb

Epilobium strictum - downy willow-herb

ORCHIDACEAE

Arethusa bulbosa - swamp-pink

Calopogon tuberosus - tuberous grass pink

Platanthera clavellata - small green fringed orchid

Platanthera dilatata - white bog orchid

Pogonia ophioglossoides - snakemouth orchid

ROSACEAE

Aronia melanocarpa - black chokeberry

SALICACEAE

Salix pedicellaris - bog willow

Salix petiolaris - slender willow

SARRACENIACEAE

Sarracenia purpurea - purple pitcher-plant

SCHEUCHZERIACEAE

Scheuchzeria palustris - pod-grass

XYRIDACEAE

Xyris montana - northern yellow-eyed-grass