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CEGL000131 Pinus albicaulis / Vaccinium scoparium Forest

Type Concept Sentence: No Data Available


Common (Translated Scientific) Name: Whitebark Pine / Grouse Whortleberry Forest

Colloquial Name: No Data Available

Hierarchy Level:  Association

Type Concept: This is on of the highest subalpine forests below timberline on protected sites and on exposed ridges or south-facing slopes at lower elevations. Slopes are 8-50% gradients on south-, southeast-, and west-facing aspects. Soils are dry, cold gravelly loams to silts, generally acidic to very acidic on the surface. It occurs from 2591 to 3200 m (8500-10,500 feet) in elevation. These are generally open forests with sparse understory cover. Pinus albicaulis is the dominant tree. Pinus flexilis can be codominant or not present. Other tree species that may be present, but never codominant, include Abies lasiocarpa, Picea engelmannii, and Pinus contorta, depending on the elevation of the stand. The understory is sparse, generally only obtaining at most 50% cover. Vaccinium scoparium is the most abundant and commonly present shrub with 10-50% cover. Other shrubs present include Ribes montigenum and Juniperus communis. Few and scattered herbaceous species are common in very low amounts and include Arnica latifolia, Poa nervosa, Carex geyeri, and Carex rossii. This association is differentiated from similar associations by the dominance of Pinus albicaulis to the exclusion of other conifers.

Diagnostic Characteristics: No Data Available

Rationale for Nominal Species or Physiognomic Features: No Data Available

Classification Comments: No Data Available

Similar NVC Types: No Data Available
note: No Data Available

Physiognomy and Structure: No Data Available

Floristics: These are generally open forests with sparse understory cover. Pinus albicaulis is the predominant tree. Pinus flexilis can be codominant. Other tree species that may be present include Abies lasiocarpa, Picea engelmannii, and Pinus contorta, depending on the elevation of the stand. The understory is sparse, generally only obtaining at most 50% cover. Vaccinium scoparium is the most abundant and commonly present shrub with 10-50% cover. Other shrubs present include Ribes montigenum and Juniperus communis. Few and scattered herbaceous species are common in very low amounts and include Arnica latifolia, Poa nervosa, Carex geyeri, and Carex rossii. Pine duff litter, bare ground and rock outcrops make up the bulk of the ground cover.

Dynamics:  No Data Available

Environmental Description:  This is one of the highest subalpine forests below timberline on protected sites and on exposed ridges or south-facing slopes at lower elevations. Slopes are 25-40% gradients on south-, southeast-, and west-facing aspects. Soils are dry, cold gravelly loams to silts, generally acidic to very acidic on the surface. It occurs from 2591 to 3200 m (8500-10,500 feet) in elevation.

Geographic Range: This open subalpine forest occurs in Idaho, Montana, Oregon, and Wyoming. It is suspected to also occur in Alberta and British Columbia, Canada.

Nations: CA?,US

States/Provinces:  AB?, ID, MT, OR, WY




Confidence Level: Moderate

Confidence Level Comments: No Data Available

Grank: G4

Greasons: No Data Available


Concept Lineage: No Data Available

Predecessors: No Data Available

Obsolete Names: No Data Available

Obsolete Parents: No Data Available

Synonomy: = Pinus albicaulis - Pinus flexilis / Potentilla diversifolia Habitat Type (Reed 1969) [description (p.25), tree data Table 7 (p.43), and understory data Table 13 (p.56).]
= Pinus albicaulis - Vaccinium scoparium Habitat Type (Reed 1976) [(p.168)]
= Pinus albicaulis / Vaccinium scoparium Habitat Type (Cooper 1975) [(p.52)]
= Pinus albicaulis / Vaccinium scoparium Habitat Type (Steele et al. 1983) [(p.66)]
= Pinus albicaulis / Vaccinium scoparium Plant Association (Johnston 1987) [(p.100)]

Concept Author(s): Steele et al. (1983)

Author of Description: G. Kittel

Acknowledgements: No Data Available

Version Date: 01-03-05

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  • Bourgeron, P. S., and L. D. Engelking, editors. 1994. A preliminary vegetation classification of the western United States. Unpublished report. The Nature Conservancy, Western Heritage Task Force, Boulder, CO. 175 pp. plus appendix.
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  • Steele, R., S. V. Cooper, D. M. Ondov, D. W. Roberts, and R. D. Pfister. 1983. Forest habitat types of eastern Idaho - western Wyoming. General Technical Report INT-144. USDA Forest Service, Intermountain Forest and Range Experiment Station, Ogden, UT. 122 pp.
  • Terwilliger, C., K. Hess, and C. Wasser. 1979a. Key to the preliminary habitat types of Region 2. Addendum to initial progress report for habitat type classification. USDA Forest Service, Rocky Mountain Forest and Range Experiment Station. Fort Collins, CO.
  • Western Ecology Working Group of NatureServe. No date. International Ecological Classification Standard: International Vegetation Classification. Terrestrial Vegetation. NatureServe, Boulder, CO.