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Name
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Reference
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Plots↓
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Description |
Comm #5411
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Alnus incana / Spiraea douglasii Shrubland
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accession code: VB.CC.24646.ALNUSINCANASPIR
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Western Ecology Working Group of... |
0
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This association occurs in Washington, Oregon and California. This riparian tall-shrub (or small-tree) community is common in eastern Oregon at elevations of 670-1740 m (2200-5700 feet). Stands are found on a variety of riparian fluvial surfaces. Soil textures vary from loam to sandy loam grading into cobbles and gravels. Soils are well drained, but remain wet-moist because of the proximity of water. The shrub canopy is dominated by Alnus incana (42% cover) and Spiraea douglasii (18% cover). Forb cover averages 29%, and is typified by Maianthemum stellatum (4%), Galium triflorum (2%), and Achillea millefolium (1%). Important graminoids are Carex angustata (= Carex eurycarpa) (5%), Glyceria striata (= Glyceria elata) (4%), and Carex disperma (3%). Athyrium filix-femina (2%) is also common. |
Comm #5412
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CEGL008485
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accession code: VB.CC.7808.CEGL008485
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
0
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Comm #5413
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Juniperus occidentalis var. australis / Holodiscus discolor Woodland
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accession code: VB.CC.33522.CEGL003137
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Western Ecology Working Group of... |
0
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This woodland association is currently only known from Yosemite National Park in California, and the following description is based on occurrences there. Additional information will be added as it becomes available. This association is typically found between 2650 and 2800 m (8700-9200 feet) of elevation. Stands typically grow on southeast and southwest aspects with high solar radiation. Slopes are very steep, often more than 50%. Stands prefer middle and upper slope positions and have a high percentage of bare ground and surface rock, often more than 50%. <i>Juniperus occidentalis var. australis</i> is the dominant tree species. <i>Pinus contorta</i> and <i>Pinus monticola</i> are common associates. <i>Holodiscus discolor</i> is the diagnostic shrub species. Other shrubs that occur at lower frequency include <i>Arctostaphylos nevadensis, Artemisia rothrockii</i>, and <i>Amelanchier utahensis</i>. |
Comm #5414
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Pinus monticola Forest Alliance
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accession code: VB.CC.26529.PINUSMONTICOLAF
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Western Ecology Working Group of... |
0
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This is a mid-seral evergreen coniferous forest that once was a major forest component in the mid elevations of the northern Rocky Mountains of Idaho, Montana, Oregon, Washington and British Columbia. Timber harvesting, the impact of the exotic pathogen blister rust, and successional stand development with fire suppression have reduced this type to less than 5% of its historic range. The forest canopy is dominated by Pinus monticola with a wide variety of co-occurring/codominant trees such as Pseudotsuga menziesii, Abies grandis, and Larix occidentalis. The understory can be a mixture of deciduous shrubs, such as Acer glabrum, and/or mesic site forbs Aralia nudicaulis, Asarum caudatum, and Clintonia uniflora. The impact of management activities to select blister rust-resistant trees on this natural forest community cannot be evaluated. There are few viable occurrences of this once common forest type remaining, and there is a long-term threat of the future extinction of this community. |
Comm #5415
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CEGL007985
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accession code: VB.CC.7529.CEGL007985
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
0
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Comm #5416
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Carex helleri - Saxifraga tolmiei - Luzula spicata Herbaceous Vegetation
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accession code: VB.CC.34057.CEGL003139
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Western Ecology Working Group of... |
0
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This herbaceous association is currently only known from Yosemite National Park in California, and the following description is based on occurrences there. Additional information will be added as it becomes available. This alpine herbaceous/grassland association grows in sheltered cold concavities that retain snowpatches, often persisting until late July. Elevations average about 3100 m (10,200 feet). Stands are found on moderately steep to steep midslopes, and aspects are north to east. Soils are rapidly drained sands derived from granitic and metamorphic parent materials. Much of the substrate is broken talus or bedrock. This sparse herbaceous/grassland association forms an open canopy less than 0.5 m in height. Total vegetative cover is less than 20%. Stands are codominated by the graminoid <i>Carex helleri</i> and the forb <i>Saxifraga tolmiei</i>. <i>Luzula divaricata</i> is also diagnostic but has lower constancy than the dominant species. This vegetation is not very diverse; only nine species were recorded from a plot. Other graminoids recorded at trace amounts include <i>Carex breweri</i> and/or <i>Trisetum spicatum</i>. Forbs present in trace amounts may include <i>Arabis lyallii, Arabis platysperma, Lupinus lepidus</i>, and/or <i>Silene sargentii</i>. Traces of emergent krummholz <i>Pinus albicaulis</i> may be present. |
Comm #5417
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Prosopis glandulosa / Pleuraphis mutica Shrub Herbaceous Vegetation
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accession code: VB.CC.21642.PROSOPISGLANDUL
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Western Ecology Working Group of... |
0
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Comm #5418
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CEGL003992
» more details
accession code: VB.CC.5785.CEGL003992
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
0
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Comm #5419
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CEGL003996
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accession code: VB.CC.5786.CEGL003996
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
0
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Comm #5420
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CEGL005273
» more details
accession code: VB.CC.6577.CEGL005273
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
0
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