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Thuja plicata / Clintonia uniflora Forest | NatureServe Biotics 2019
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Name: Thuja plicata / Clintonia uniflora Forest
Reference: NatureServe Biotics 2019
Description: This association represents the warmest and driest <i>Thuja plicata</i>-dominated forests. Elevation range is 670 to 1530 m (2200-5000 feet). Stands occur on bottomlands, benches, and lower slopes with gentle to steep gradients, most often on gentle slopes. All aspects are represented. Soils are volcanic ash over glacial till or outwash with variable parent material. Soil textures are silt loams to mostly sandy loams, with high coarse fragments (16-63%). All soils are well- to moderately well-drained. <i>Thuja plicata</i> is dominant in the overstory and in the subcanopy as a reproducing tree. Undergrowth is characterized by scattered mesophytic herbs and subshrubs of which <i>Clintonia uniflora</i> is the most diagnostic. <i>Thuja plicata</i> is dominant or codominant and the characteristic tree (average cover ranges between 35 and 60%). <i>Pseudotsuga menziesii, Larix occidentalis, Pinus contorta</i>, and <i>Abies grandis</i> are often abundant codominants (average cover ranging from 10-30%). The shrub layer is relatively sparse with 5-10% cover. Shrub species present include <i>Paxistima myrsinites, Linnaea borealis, Mahonia repens</i>, and <i>Lonicera utahensis</i>. The herbaceous layer is not abundant, with a high variance in the forb and grass species present. <i>Goodyera oblongifolia, Chimaphila umbellata, Clintonia uniflora, Tiarella trifoliata, Coptis occidentalis, Orthilia secunda</i>, and <i>Viola orbiculata</i> are the more commonly encountered species, but with very low abundance (1-3%), occasionally with as much as 5% cover. <i>Clintonia uniflora</i>, while not present in all stands, is the indicator species for this relatively depauperate type; other indicators include <i>Tiarella trifoliata, Coptis occidentalis</i>, and <i>Adenocaulon bicolor</i>. 
Accession Code: urn:lsid:vegbank.org:commConcept:29383-{2966F3A9-0236-437A-90DF-08D0A26EBB81}
Plot-observations of this Community Concept: 5
      Party Perspective according to: NatureServe (organization)
Perspective from: 14-Apr-2004 to: ongoing
      Names:   UID: ELEMENT_GLOBAL.2.685134 NatureServe ExplorerNatureServe Explorer logo
  Code: CEGL000474
  Translated: Western Red-cedar / Bride's Bonnet Forest
  Scientific: Thuja plicata / Clintonia uniflora Forest
(convergence) and Synonyms:
(similar) CEGL000474
(similar) Thuja plicata / Clintonia uniflora Forest
(similar) Thuja plicata / Clintonia uniflora Forest