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Name
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Reference
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Description |
Comm #11771
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Acer negundo / Betula occidentalis Woodland
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accession code: VB.CC.34552.CEGL000936
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Western Ecology Working Group of... |
0
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In Colorado these riparian woodlands grow in narrow, sandstone box canyons of western Colorado. Stands are dominated by a medium-tall (2.5-5.5 m) broad-leaved, deciduous tree canopy. This woodland appear to be a very unusual combination, and is considered a rare plant association. <i>Acer negundo</i> dominates the overstory with 40-70% cover. The shrub layer is dominated by 25-80% cover of <i>Betula occidentalis</i>. Other shrub species include 0-30% cover of <i>Salix exigua</i> and 0-10% cover each of <i>Forestiera pubescens</i> and <i>Clematis ligusticifolia</i>. Herbaceous undergrowth is sparse. Information on stands that occur outside Colorado will be added later. |
Comm #11772
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CEGL004222
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accession code: VB.CC.5888.CEGL004222
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
0
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Comm #11773
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Populus angustifolia / Alnus oblongifolia Woodland
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accession code: VB.CC.32632.CEGL000938
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Western Ecology Working Group of... |
0
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This community type occurs at elevations ranging between 1840 and 2120 m (6050-6950 feet) in narrow ravines or canyons in the Rio Grande and Gila River basins in southwestern and central New Mexico and adjacent Arizona. Limited data suggest that this type may be found along alluvial bars and along streambanks in positions above bankfull stream levels (discharge ratios range from 1.0 to 13.3). Streams have moderate to high gradients (1.0-4.5%), beds that are gravelly/cobbly, and flows that can be either perennial or intermittent. Flooding is estimated to recur anywhere from 2 to 25 years. Soils are poorly developed, well-drained, sandy and rocky. They can be somewhat wet within rooting depths during high flow periods (Oxyaquic Ustifluvents and Torrifluvents). Canopies are dense (>60% cover) and codominated by <i>Populus angustifolia</i> and <i>Alnus oblongifolia</i>. When cottonwoods are few in number, these trees are usually larger and more mature than the alders. Both species show good reproduction as saplings and seedlings. Young <i>Acer negundo</i> saplings are also common beneath the tree canopy and occasionally extend into the canopy. <i>Salix gooddingii, Acer negundo, Juglans major, Juniperus deppeana, Juniperus monosperma</i>, and <i>Juniperus scopulorum</i> are also possible in the understory. <i>Brickellia californica</i> can be common to abundant in the shrub layer and may be indicative for this type. The herbaceous layer is characteristically grassy and moderately diverse (44 herb species recorded for the type). <i>Poa pratensis</i> is the most common grass, sometimes codominating with <i>Bouteloua curtipendula</i> and <i>Bouteloua gracilis</i>. Thirteen wetland indicators have been recorded for the type, including <i>Glyceria striata, Equisetum arvense, Mimulus guttatus, Rumex crispus, Veronica americana, Rudbeckia laciniata, Oxypolis fendleri</i>, and <i>Cicuta douglasii</i>. |
Comm #11774
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Cercocarpus ledifolius / Artemisia tridentata Woodland
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accession code: VB.CC.34155.CEGL000960
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Western Ecology Working Group of... |
0
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This woodland is known from Nevada, Idaho and southern Utah. The following description is from southern Nevada and southern Utah stands. This woodland occurs on high mountain slopes and ridges or low washes at 2072 to 2835 m (6800-9300 feet) elevation. Soils are rapidly drained sandy loams derived from alluvium or rhyolitic welded ash-flows. This woodland appears as clumps of taller <i>Cercocarpus ledifolius</i> amongst a sea of the lower statured <i>Artemisia tridentata</i>. Other tree species may include <i>Juniperus osteosperma, Juniperus scopulorum</i>, pinyon spp., and <i>Pinus ponderosa</i>. Other shrubs include <i>Amelanchier pallida, Purshia tridentata, Chrysothamnus</i> spp., <i>Gutierrezia sarothrae, Tetradymia canescens, Sambucus caerulea, Symphoricarpos</i> spp., and <i>Ericameria nauseosa</i>. The herbaceous layer has sparse cover and includes the bunchgrasses <i>Achnatherum hymenoides</i> and <i>Elymus elymoides</i>. |
Comm #11775
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Cercocarpus ledifolius / Holodiscus dumosus Woodland
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accession code: VB.CC.34125.CEGL000963
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Western Ecology Working Group of... |
0
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This association is described from stands located on the slopes of Germer Peak, Idaho, within the Challis Volcanics ecoregional section, within an area known as the Challis Endemics region, (an area of high plant species endemism). This plant association occurs on quartzite cliffs around Germer Peak, at elevations from 2075 to 2320 m (6800-7600 feet). No other information is available, but it can be assumed that slopes are steep, and sites are rocky. Soils are probably poorly developed, shallow, and coarse-textured (loamy sands to sandy loams). Little information is available regarding the structure and composition of this association. <i>Cercocarpus ledifolius</i> forms an open, low-density, woodland canopy. <i>Holodiscus dumosus</i> forms a dense understory shrub canopy. |
Comm #11776
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CEGL001852
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accession code: VB.CC.4406.CEGL001852
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
0
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Comm #11777
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Metrosideros polymorpha / Cheirodendron spp. Montane Wet Forest
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accession code: VB.CC.24180.METROSIDEROSPOL
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Western Ecology Working Group of... |
0
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Comm #11778
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Festuca viridula - Lupinus argenteus var. laxiflorus Herbaceous Vegetation
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accession code: VB.CC.34148.CEGL001634
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Western Ecology Working Group of... |
0
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Comm #11779
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Quercus turbinella - Coleogyne ramosissima Shrubland
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accession code: VB.CC.32776.CEGL000982
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Western Ecology Working Group of... |
0
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This scrub oak shrubland association is currently described from Grand Canyon National Park in Arizona. More survey and classification work are needed to fully characterize this type. It occurs on sideslopes and terraces in at 1200 to 1700 m (3925-5500 feet) elevation, and is typically found on gentle slopes (5-8°) with eastern exposures. Soils are well- to rapidly-drained silty or sandy loams that typically lie above sandstone or limestone. Total shrub cover averages 20-30% and is codominated by the short shrubs <i>Quercus turbinella</i> and <i>Coleogyne ramosissima</i>. The canopy tree <i>Pinus edulis</i> and the subcanopy tree <i>Juniperus osteosperma</i> are occasionally found. The short-shrub layer also occasionally includes <i>Amelanchier utahensis, Ephedra fasciculata</i>, and <i>Yucca baccata</i>. <i>Agave utahensis</i> is invariably present in a sparse dwarf-shrub stratum. <i>Aristida purpurea</i> consistently occurs in an extremely weak graminoid layer. Scattered forbs do exist, but their cover is so low that they hardly constitute a layer. |
Comm #11780
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Inland Marine Strand Beach Sparse Vegetation
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accession code: VB.CC.22746.INLANDMARINESTR
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Midwestern Ecology Working Group... |
0
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