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Tsuga heterophylla - (Pseudotsuga menziesii) / Tiarella trifoliata - Gymnocarpium dryopteris Forest | NatureServe Biotics 2019
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Name: Tsuga heterophylla - (Pseudotsuga menziesii) / Tiarella trifoliata - Gymnocarpium dryopteris Forest
Reference: NatureServe Biotics 2019
Description: The canopy is usually dominated by <i>Tsuga heterophylla</i> and <i>Pseudotsuga menziesii</i>, although the latter can be absent. <i>Thuja plicata</i> is usually prominent to codominant, and <i>Abies grandis</i> is often present to prominent. The shrub layer is poorly developed and usually has small amounts of <i>Acer circinatum, Oplopanax horridus</i>, and <i>Vaccinium parvifolium</i>. The herb layer tends to be well-developed and usually includes <i>Tiarella trifoliata, Gymnocarpium dryopteris, Blechnum spicant, Linnaea borealis, Polystichum munitum</i> (low percent cover), <i>Athyrium filix-femina</i>, and <i>Cornus unalaschkensis</i>. <i>Tiarella trifoliata</i> and <i>Gymnocarpium dryopteris</i> each occupy over 1% cover. This association occurs in the western Cascades and Olympic Mountains. It is found from low to middle elevations on valley bottoms, riverine terraces and floodplains, as well as on gentle toe slopes. Soils are typically subirrigated. This association occurs within a narrow environmental range in western Washington and has been impacted by logging. 
Accession Code: urn:lsid:vegbank.org:commConcept:35555-{1169C9B7-540D-48E8-8559-F5BC9CA47BC7}
Plot-observations of this Community Concept: 0
      Party Perspective according to: NatureServe (organization)
Perspective from: 27-Mar-2017 to: ongoing
      Names:   UID: ELEMENT_GLOBAL.2.979451 NatureServe ExplorerNatureServe Explorer logo
  Code: CEGL007305
  Translated: Western Hemlock - (Douglas-fir) / Threeleaf Foamflower - Western Oakfern Forest
  Scientific: Tsuga heterophylla - (Pseudotsuga menziesii) / Tiarella trifoliata - Gymnocarpium dryopteris Forest