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Abies amabilis - Tsuga mertensiana / Oplopanax horridus Swamp Forest | NatureServe Biotics 2019
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Name: Abies amabilis - Tsuga mertensiana / Oplopanax horridus Swamp Forest
Reference: NatureServe Biotics 2019
Description: This association occurs in the northwestern Cascade Range of Washington and probably in the Coastal Mountains of British Columbia. This is a needle-leaved evergreen conifer forest, or less commonly, woodland. <i>Tsuga mertensiana</i> and <i>Abies amabilis</i> dominate the canopy. <i>Tsuga heterophylla</i> is usually prominent also, and <i>Callitropsis nootkatensis</i> occasional. The understory typically has a moderately dense layer of deciduous broad-leaved shrubs about 0.5-2.0 m tall dominated by <i>Vaccinium ovalifolium</i> (most abundant shrub), <i>Oplopanax horridus</i>, and <i>Rubus spectabilis</i>. <i>Menziesia ferruginea</i> is usually present also. A relatively lush, diverse forb-dominated herbaceous layer typically has <i>Rubus pedatus, Streptopus lanceolatus var. curvipes, Athyrium filix-femina, Clintonia uniflora, Gymnocarpium dryopteris</i>, and <i>Tiarella trifoliata</i>. In Washington, it occurs at elevations of 780-1300 m, on lower slopes either adjacent to small streams or on sites with subirrigated soils where the rooting zone is kept very moist to saturated year-round by water moving downslope above an impermeable layer. Snowpacks are moderately deep, averaging 2.5 m. This association is distinguished from similar associations by at least 10% cover of <i>Tsuga mertensiana</i> and 5% cover of <i>Oplopanax horridus</i>, and little to no <i>Caltha leptosepala ssp. howellii, Lysichiton americanus</i>, or <i>Nephrophyllidium crista-galli</i>. 
Accession Code: urn:lsid:vegbank.org:commConcept:29416-{0388E2B3-03BF-4C09-A74C-7AE26BCC8EA1}
Plot-observations of this Community Concept: 0
      Party Perspective according to: NatureServe (organization)
Perspective from: 26-Nov-1997 to: ongoing
      Names:   UID: ELEMENT_GLOBAL.2.684732 NatureServe ExplorerNatureServe Explorer logo
  Code: CEGL000507
  Translated: Pacific Silver Fir - Mountain Hemlock / Devil's-club Swamp Forest
  Scientific: Abies amabilis - Tsuga mertensiana / Oplopanax horridus Swamp Forest
(convergence) and Synonyms:
(similar) CEGL000507
(similar) Tsuga mertensiana - Abies amabilis / Oplopanax horridus Forest
(similar) Tsuga mertensiana - Abies amabilis / Oplopanax horridus Forest