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Ledum glandulosum / Carex obnupta / Sphagnum spp. Shrubland | Western Ecology Working Group of...
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Name: Ledum glandulosum / Carex obnupta / Sphagnum spp. Shrubland Reference: Western Ecology Working Group of... Description: Distinguished from similar associations farther north by the dominance of Ledum glandulosum instead of Ledum groenlandicum, this vegetation occurs only between the Columbia River and northern California. This early-seral association occurs in open mire complexes in poorly drained basins, valleys, and on floating lake mats. Circular or elliptical hummocks 1-3 feet taller than the surrounding mire surface form islands of ombrotrophic vegetation in otherwise minerotrophic mire fed by springs, runoff, or lakewater. Mature trees are absent, but reproducing Thuja plicata and Pinus contorta var. contorta occur in about half the plots and are slow-growing and stunted, most dying before maturity. The shrub layer is dominated by Ledum glandulosum with up to 60% cover. Kalmia microphylla or Vaccinium uliginosum are occasional. Two distinct variants occur with either Sphagnum palustre or Sphagnum fuscum dominant in the moss layer. The herb layer in the Sphagnum palustre variant typically contains 15-25 species and is characterized by Vaccinium oxycoccos, Drosera rotundifolia, Lysichiton americanus, Eriophorum chamissonis, Trientalis europaea ssp. arctica, Carex echinata ssp. phyllomanica, and Carex leptalea. The herb layer in the Sphagnum fuscum variant is conspicuously dwarfed and species-poor (10 or fewer) because of high acidity and low nutrient status. Hollows between hummocks in both variants are generally wet, species-poor, and consist almost entirely of lawns of Sphagnum angustifolium, Sphagnum pacificum, or bare muddy bottoms if trailed by elk and deer.  Accession Code: VB.CC.22650.LEDUMGLANDULOSU Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 21-Oct-2002 to: 17-Nov-2014
	status: accepted Community's Parent: Ledum glandulosum Saturated Shrubland Alliance This Community's Level: Association This Community's Children: [none]		Names:   Code: CEGL003434   Translated: Glandular Labrador-tea / Slough Sedge / Peatmoss species Shrubland   UID: ELEMENT_GLOBAL.2.686837 NatureServe Explorer   Scientific: Ledum glandulosum / Carex obnupta / Sphagnum spp. Shrubland (convergence) and Synonyms: (undetermined) Ledum glandulosum / Carex obnupta / Sphagnum spp. Shrubland