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Ledum glandulosum / Sanguisorba officinalis / Sphagnum spp. Fen | NatureServe Biotics 2019
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Name: Ledum glandulosum / Sanguisorba officinalis / Sphagnum spp. Fen
Reference: NatureServe Biotics 2019
Description: This early-seral association occurs in open mire complexes in poorly drained basins and valleys. It is known in Oregon only from coastal Curry County, and presumably extends into northern California, but likely habitat diminishes farther south of Del Norte County. 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 and runoff. Mature trees are absent. The shrub layer is dominated by <i>Ledum glandulosum</i> with 3-75% cover. <i>Gaultheria shallon</i> is a frequent associate, but <i>Vaccinium uliginosum</i> is scarce. <i>Sphagnum palustre</i> with up to 99% cover fills openings among the <i>Ledum</i> stems. The herb layer is extremely diverse and includes 21 species. <i>Sanguisorba officinalis</i> is the dominant herb, with up to 60% cover. <i>Carex echinata ssp. phyllomanica, Blechnum spicant</i>, and <i>Agrostis exarata</i> are characteristic of this association. A diversity of herbaceous species present are unusual for wetland associations. <i>Sisyrinchium californicum</i> is otherwise known mostly from deflation plains among coastal sand dunes. <i>Veratrum californicum</i> is more common in montane meadows than coastal peatlands. <i>Carex buxbaumii</i> is otherwise known in Oregon only from middle to upper elevations in the Cascade Range. <i>Helenium bolanderi, Rhynchospora capitellata, Senecio triangularis</i>, and <i>Lilium occidentale</i> are all at the northern end of their range. Hollows between hummocks are generally wet, species-poor, and consist almost entirely of lawns of <i>Sphagnum angustifolium, Sphagnum pacificum</i>, or bare muddy bottoms if trailed by elk and deer. 
Accession Code: urn:lsid:vegbank.org:commConcept:32318-{8ECAB0E9-6B78-49E6-AF12-2D706F0D2C64}
Plot-observations of this Community Concept: 0
      Party Perspective according to: NatureServe (organization)
Perspective from: 21-Oct-2002 to: ongoing
      Names:   UID: ELEMENT_GLOBAL.2.686908 NatureServe ExplorerNatureServe Explorer logo
  Code: CEGL003436
  Translated: Western Labrador-tea / Great Burnet / Peatmoss species Fen
  Scientific: Ledum glandulosum / Sanguisorba officinalis / Sphagnum spp. Fen
(convergence) and Synonyms:
(similar) Ledum glandulosum / Sanguisorba officinalis / Sphagnum spp. Shrubland
(similar) CEGL003436
(similar) Ledum glandulosum / Sanguisorba officinalis / Sphagnum spp. Shrubland