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Description |
Comm #11571
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Fraxinus pennsylvanica - Ulmus americana / Symphoricarpos occidentalis Forest
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accession code: VB.CC.36936.CEGL002082
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Midwestern Ecology Working Group... |
0
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This ash - elm woody draw community type is found in the northern Great Plains of the United States and Canada. Stands occur on upland sites along steep north-facing slopes and, occasionally, along intermittent drainages or near the bases of north-facing slopes of upland sites. Soils are typically moist and poorly drained, and usually silty clay or clay. This is a moderately to densely vegetated forest with an open to dense shrub understory. The average height of the tree layer is 5-8 m. The tree layer is dominated by <i>Fraxinus pennsylvanica</i> and <i>Ulmus americana</i>. Widely scattered old <i>Populus deltoides</i> occur as remnants of a previous successional stage. The often dense shrub layer is dominated by <i>Symphoricarpos occidentalis</i>. Other shrubs present include <i>Rosa woodsii, Juniperus scopulorum</i> (which can also be in the canopy or subcanopy), and <i>Prunus virginiana</i>. <i>Symphoricarpos occidentalis</i> tends to increase under grazing pressure, and it may be almost the only shrub where grazing has been intense. Herbaceous species present include <i>Pascopyrum smithii, Andropogon gerardii, Poa</i> spp., <i>Carex</i> spp. (wide leaf), <i>Rumex</i> spp., <i>Carex filifolia, Anemone cylindrica, Piptatherum micranthum (= Oryzopsis micrantha), Galium</i> spp., <i>Anemone canadensis, Taraxacum</i> spp., <i>Lappula</i> spp., <i>Conyza canadensis</i>, and <i>Cirsium</i> spp. |
Comm #11572
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Artemisia tridentata ssp. wyomingensis / Pleuraphis jamesii Shrubland
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accession code: VB.CC.31945.CEGL002084
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Western Ecology Working Group of... |
0
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This shrubland association occurs on alluvial flats and terraces, as well as on upland slopes and mesas in the Colorado Plateau. Sites tend to have gentle to moderately steep slopes, and elevations range from 1400 to 1939 m (4600-6360 feet). Known sites have an east or southeast aspect. Soils are derived from a wide variety of substrates; however, soil texture tends to be a sandy loam. Cryptobiotic crust cover is usually present. The vegetation is characterized by a moderately dense canopy of <i>Artemisia tridentata ssp. wyomingensis</i> with a sparse herbaceous understory dominated by <i>Pleuraphis jamesii</i>. Other shrubs present may include scattered individuals of <i>Atriplex confertifolia, Sarcobatus vermiculatus, Ericameria nauseosa, Gutierrezia sarothrae</i>, and <i>Opuntia</i> spp. <i>Achnatherum hymenoides, Hesperostipa comata, Pseudoroegneria spicata, Poa secunda</i>, and <i>Leymus salinus</i> may be present in addition to <i>Pleuraphis jamesii</i>. Forbs tend to be sparse and inconsistent among stands but may include <i>Calochortus</i> spp., <i>Astragalus nuttallianus, Oenothera pallida</i>, and <i>Sphaeralcea coccinea</i>. |
Comm #11573
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Erodium cicutarium Ruderal Annual Herbaceous Vegetation
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accession code: VB.CC.32048.CEGL002085
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Western Ecology Working Group of... |
0
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This small-patch annual exotic herbaceous association occurs on ridges and valley bottoms in highly disturbed sites in the Colorado Plateau. Sites occupied by this association are generally associated with severe disturbance, such as annual grazing by sheep and/or cattle, mining or a very hot fire. Elevations range from 1692 to 2306 m (5550-7565 feet), and sites occur on level to moderate slopes with south to west exposures. Soils are generally sandy and derived from eolian or alluvial deposits. Cryptobiotic crusts may cover much of the unvegetated surface in sites that have not been grazed recently. Total vegetation cover is sparse to moderate (16-40%), depending on the amount of winter/spring precipitation and the time of year a site is sampled. The exotic annual forb <i>Erodium cicutarium</i> provides most of the vegetative cover, but other weedy and exotic species are also generally present, including <i>Bromus tectorum, Descurainia pinnata, Sisymbrium altissimum, Carduus nutans</i>, and <i>Tragopogon dubius</i>. A few scattered shrubs typical of sandy alkaline conditions may be present, including <i>Atriplex canescens, Opuntia polyacantha, Ephedra viridis, Lycium pallidum</i>, and <i>Quercus gambelii</i>. |
Comm #11574
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CEGL002519
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accession code: VB.CC.4940.CEGL002519
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
0
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Comm #11575
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Pseudotsuga menziesii / Cornus canadensis Forest
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accession code: VB.CC.32886.CEGL000432
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Western Ecology Working Group of... |
0
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Comm #11576
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CEGL000946
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accession code: VB.CC.3548.CEGL000946
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
0
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Comm #11577
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CEGL004433
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accession code: VB.CC.5993.CEGL004433
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
0
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Comm #11578
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CEGL001780
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accession code: VB.CC.4337.CEGL001780
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
0
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Comm #11579
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Carya illinoinensis - Celtis laevigata Forest
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accession code: VB.CC.36223.CEGL002087
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Southeastern Ecology Working Gro... |
0
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This forest is found on nearly level floodplains and terraces along major streams and rivers in the central and south-central United States, ranging from Kansas and Arkansas, south to Texas and Louisiana. Soils are deep, poorly drained to well-drained, and formed in silty, loamy and clayey recent alluvium. The vegetation is dominated by a closed-canopy forest. Characteristic dominants include <i>Carya illinoinensis</i> and <i>Celtis laevigata</i>. In Oklahoma, other characteristic species include <i>Fraxinus pennsylvanica, Ilex decidua, Quercus shumardii, Sapindus saponaria var. drummondii</i>, in Kansas they include <i>Acer negundo, Fraxinus pennsylvanica, Juglans nigra, Platanus occidentalis</i>, and <i>Ulmus americana</i>, and in Texas they include <i>Fraxinus pennsylvanica, Ulmus americana, Platanus occidentalis, Sapindus saponaria var. drummondii, Cornus drummondii, Ilex decidua</i>, and <i>Acer negundo</i>. Ground layer species may include <i>Carex grayi, Parthenocissus quinquefolia, Verbesina virginica</i>, and <i>Toxicodendron radicans</i>. |
Comm #11580
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CEGL002247
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accession code: VB.CC.4762.CEGL002247
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
0
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