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Name
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Reference
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Plots↓
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Description |
Comm #11741
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VI.C
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accession code: VB.CC.153.VIC
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EcoArt 2002 |
0
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Comm #11742
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CEGL007386
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accession code: VB.CC.7094.CEGL007386
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
0
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Comm #11743
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CEGL000026
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accession code: VB.CC.2654.CEGL000026
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
0
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Comm #11744
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Chamaesyce olowaluana Montane Dry Woodland
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accession code: VB.CC.18724.CHAMAESYCEOLOWA
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Western Ecology Working Group of... |
0
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Comm #11745
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Pinus ponderosa - Quercus garryana / Arctostaphylos viscida / Festuca californica Woodland
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accession code: VB.CC.32835.CEGL000880
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Western Ecology Working Group of... |
0
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This is an open woodland or savanna with widely spaced <i>Pinus ponderosa</i> and <i>Quercus garryana</i> (and rarely <i>Quercus kelloggii</i> or <i>Arbutus menziesii</i>) trees. Patches of chaparral, dominated by <i>Ceanothus cuneatus</i> and occasionally <i>Arctostaphylos viscida</i>, occur in openings. Native grasses dominate undisturbed sites, with <i>Danthonia californica</i> found on areas with clay soils, northern slopes, or areas with some spring moisture. <i>Achnatherum lemmonii (= Stipa lemmonii), Festuca idahoensis</i>, and <i>Pseudoroegneria spicata</i> all can be found in drier or better drained sites, while <i>Festuca californica</i> and <i>Melica geyeri</i> are the dominant species in the shade. <i>Toxicodendron diversilobum</i> is found as a shrub and vine throughout these areas. This woodland association requires periodic fire to maintain its woodland character at most sites. Without fire, these woodlands first become forests of oak and pine, and eventually support Douglas-fir forests. If fire is excluded for long enough, they become a closed canopy mix of young Ponderosa pine, white oak, black oak and decadent chaparral, which burns explosively if exposed to a wildfire. In areas which are heavily grazed, introduced annual grasses (<i>Cynosurus echinatus, Taeniatherum caput-medusae, Bromus</i> spp.) and noxious weeds (<i>Centaurea solstitialis</i>) replace the native grasses and forbs as understory dominants. <br><br>Most examples of this association are found on valley bottomlands, with alluvial or clay soils of volcanic origin. However, in southwestern Oregon and northwestern California, occasional examples can be found on alluvial deposits in serpentine areas. |
Comm #11746
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CEGL001721
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accession code: VB.CC.4282.CEGL001721
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
0
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Comm #11747
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A.362
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accession code: VB.CC.2037.A362
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EcoArt 2002 |
0
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Comm #11748
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CEGL000106
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accession code: VB.CC.2733.CEGL000106
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
0
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Comm #11749
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Pseudotsuga menziesii / Cercocarpus ledifolius Woodland
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accession code: VB.CC.32888.CEGL000897
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Western Ecology Working Group of... |
0
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This is a widespread association found only occasionally in small patches in central Oregon, Idaho, western Wyoming and Montana, Utah and northwestern Colorado. It is generally found on ridgetops, plateau rims or colluvial upper slopes. Elevations range from 1220 m (4000 feet) in central Oregon to over 2750 m (9025 feet) in southern Utah. Sites are often subject to year-round winds and intense insolation, which contribute to reduced snowpacks and dry conditions. Parent materials vary widely. In Oregon, it occurs on basalts. Farther east it is found on limestone, shale, sandstone, pumice, quartz monzonite and quartzite. Soil textures vary, but the sites are characterized by extensive areas of exposed soil and rock, up to 40% at many sites. Trees are generally widely spaced, with <i>Pseudotsuga menziesii</i> generally the only tree present. At the western portions of the range, <i>Juniperus occidentalis</i> is often present, with occasional <i>Pinus ponderosa</i> trees found. Farther east, these habitats have <i>Juniperus scopulorum, Pinus edulis, Pinus longaeva</i>, and occasional <i>Pinus flexilis</i>. The understory is characterized by a tall-shrub layer dominated by <i>Cercocarpus ledifolius</i>. Other shrubs include <i>Symphoricarpos</i> spp.(<i>Symphoricarpos albus</i> in the western part of the range and <i>Symphoricarpos oreophilus</i> in the eastern part), <i>Spiraea betulifolia, Mahonia repens, Artemisia tridentata</i>, and <i>Amelanchier</i> spp.. Graminoids, including <i>Pseudoroegneria spicata, Carex geyeri, Poa fendleriana, Poa secunda</i>, and/or <i>Festuca idahoensis</i>, comprise most of the sparse herbaceous layer. |
Comm #11750
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A.3507
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accession code: VB.CC.1981.A3507
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
0
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