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Pseudotsuga menziesii / Arnica cordifolia Forest | NatureServe Biotics 2019
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Name: Pseudotsuga menziesii / Arnica cordifolia Forest Reference: NatureServe Biotics 2019 Description: This forest association occurs in the central and northern Rocky Mountains from the lower to mid montane zone. Elevations range from 1430 to 2900 m (4690-9500 feet). Sites are variable but generally on dry aspects. Substrates are variable and may be very gravelly or not, with soil textures ranging from sandy loam to silt. Ground surface has high cover of litter, often 4-7 cm deep, relatively low cover of surface rock (&lt;10%), and low cover of bare soil. The vegetation is characterized by a relatively dense (60-90% cover), evergreen needle-leaved tree canopy strongly dominated by <i>Pseudotsuga menziesii</i> with <i>Arnica cordifolia</i> or <i>Astragalus miser</i> dominating or codominating the sparse to moderately dense understory. Other mature seral tree species present include <i>Pinus contorta, Pinus flexilis</i>, or <i>Juniperus scopulorum</i>. The dense canopy limits understory development so only scattered shrubs may be present, not enough to form a shrub layer. The herbaceous layer, whether depauperate or moderately dense, dominates the forest floor and is dominated or codominated by <i>Arnica cordifolia</i> and <i>Astragalus miser</i>.  Accession Code: urn:lsid:vegbank.org:commConcept:29336-{19AAF719-CD19-4A89-955F-F8858FDC451D} Plot-observations of this Community Concept: 1
	Party Perspective according to: NatureServe (organization) Perspective from: 13-Apr-2004 to: ongoing
	status: accepted Community's Parent: Pseudotsuga menziesii Middle Rocky Mountain Dry-Mesic Forest & Woodland Alliance This Community's Level: Association This Community's Children: [none]		Names:   UID: ELEMENT_GLOBAL.2.684590 NatureServe Explorer   Code: CEGL000427   Translated: Douglas-fir / Heartleaf Leopardbane Forest   Scientific: Pseudotsuga menziesii / Arnica cordifolia Forest (convergence) and Synonyms: (similar) CEGL000427 (similar) Pseudotsuga menziesii / Arnica cordifolia Forest (similar) Pseudotsuga menziesii / Arnica cordifolia Forest