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Name
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Reference
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Description |
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Cornus sericea–Salix exigua
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accession code:
NOT CURRENTLY ACCEPTED
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CDFW Natural Communities List |
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Suaeda nigra/Lepidium dictyotum
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accession code:
NOT CURRENTLY ACCEPTED
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Great Valley Classification |
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Salix gooddingii–Fraxinus latifolia Provisional
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accession code:
NOT CURRENTLY ACCEPTED
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Great Valley Classification |
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Acer negundo–Salix gooddingii
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accession code:
NOT CURRENTLY ACCEPTED
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CDFW Natural Communities List |
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Comm #7341
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Pinus contorta / Vaccinium caespitosum Forest
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accession code: VB.CC.33145.CEGL000168
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Western Ecology Working Group of... |
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This association is found in the upper montane and subalpine zone of the Rocky Mountains from north-central Colorado to southern Alberta. It is more common near and east of the Continental Divide, but occurs in the Uinta Mountains of northern Utah and in Idaho. Elevations range from 2950-3120 m (9700-10,240 feet) in northern Colorado down to 950-1800 m (3100-5900 feet) in the northern Rocky Mountains. It typically occurs on cold, dry-mesic sites where cold air accumulates causing high diurnal temperature fluctuations often with frequent summer frosts and high daily maximum temperatures. Topography is flat to gently undulating or moderately sloping terrain typically occurring on valley bottoms, terraces, lower slopes, and benches with variable aspects, but also on steep canyon slopes and benches, plateau tops and adjacent upper slopes in the Uinta Mountains. Soils are typically well-drained, moderately deep, acidic, gravelly or non-gravelly sandy loam, loam, silt loam, silt or less frequently clay that are typically derived from a variety of noncalcareous parent materials. Ground cover is mostly litter, often with duff over 3 cm deep. The vegetation is characterized by a <i>Pinus contorta</i>-dominated tree canopy with <i>Vaccinium caespitosum</i> dominating or codominating the patchy to continuous dwarf-shrub layer. The tree canopy varies from moderately dense to nearly closed (40-90% cover) and is often composed solely of <i>Pinus contorta</i>. However, in some stands scattered <i>Abies lasiocarpa, Larix occidentalis, Picea engelmannii, Pinus albicaulis, Populus tremuloides</i>, or <i>Pseudotsuga menziesii</i> trees may be present, especially in the subcanopy. Some stands have tree saplings and scattered shrubs. <i>Vaccinium caespitosum</i> (indicator species) is usually dominates or codominates the dwarf-shrub layer. Other dwarf-shrubs may include low cover of <i>Arctostaphylos uva-ursi, Paxistima myrsinites, Ribes</i> spp., <i>Linnaea borealis</i> (on more mesic sites), or <i>Juniperus communis</i> and <i>Vaccinium scoparium</i> (drier sites). The herbaceous layer is sparse to moderately dense (to 30% cover) and is typically dominated or codominated by perennial graminoids such as <i>Calamagrostis rubescens, Danthonia intermedia, Deschampsia caespitosa, Carex geyeri, Carex rossii</i>, or <i>Festuca</i> spp. Forbs are generally have sparse cover but may be diverse. Mosses and lichens are common (5-20% cover) on some sites. |
Comm #7342
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Pinus contorta / Vaccinium membranaceum Rocky Mountain Forest
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accession code: VB.CC.36575.CEGL000169
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This type is known from Yellowstone and Grand Teton national parks in northwestern Wyoming, southwestern Idaho south to Utah. It occurs on moist slopes and benches having northerly to easterly aspects, between 2055 and 2440 m (6730-8000 feet) in elevation. Soils are loam-based and are well- to moderately well-drained. In Oregon it occurs on moist sites above 1525 m (5000 feet) and below 1830 m (6000 feet), on slopes <15%. In Oregon and Montana, stands are considered seral to <i>~Abies lasiocarpa / Vaccinium membranaceum</i> Forest (CEGL000342)$$. The overstory canopy is dominated by <i>Pinus contorta</i>. Other conifers that may be present as incidental individuals are <i>Abies lasiocarpa, Pseudotsuga menziesii</i>, and <i>Picea engelmannii</i>. In Montana, stands dominated by <i>Pinus contorta</i>, but with <i>Abies lasiocarpa</i> in the subcanopy, are classified as <i>~Abies lasiocarpa / Vaccinium membranaceum</i> Forest (CEGL000342)$$ but would be included here floristically. The undergrowth is usually dominated by <i>Vaccinium membranaceum</i>, with <i>Lonicera utahensis</i>. Other shrubs occasionally present include <i>Shepherdia canadensis</i> and <i>Spiraea betulifolia</i>. <i>Vaccinium scoparium</i> can be well-represented. Herbaceous species include <i>Calamagrostis rubescens, Carex geyeri</i>, and <i>Arnica cordifolia</i>. |
Comm #7343
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Pinus monophylla - Juniperus osteosperma / Prunus virginiana Woodland
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accession code: VB.CC.33620.CEGL000836
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Western Ecology Working Group of... |
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Comm #7344
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Pinus monophylla - Juniperus osteosperma - Quercus gambelii / Artemisia tridentata Woodland
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accession code: VB.CC.33230.CEGL000837
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Western Ecology Working Group of... |
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Comm #7345
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Pinus monophylla - Quercus gambelii / Artemisia tridentata Woodland
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accession code: VB.CC.33617.CEGL000838
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Western Ecology Working Group of... |
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Comm #7346
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Pinus monophylla / Symphoricarpos oreophilus - Artemisia tridentata Woodland
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accession code: VB.CC.32828.CEGL000839
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Western Ecology Working Group of... |
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