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Reference
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Description |
Comm #6981
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Pinus palustris / Schizachyrium scoparium - Liatris pycnostachya Woodland
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accession code: VB.CC.36008.CEGL003571
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Southeastern Ecology Working Gro... |
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This mesic longleaf pine woodland occurs in the West Gulf Coastal Plain. It is dominated by a generally open canopy of mature, tall <i>Pinus palustris</i> (20-25 m in height). The herbaceous layer is extremely diverse and is dominated by graminoids, legumes, and composites. This community occurs on gently rolling topography over moderately well-drained silt loams and fine sandy loams, typically downslope from 'tableland' flatwoods which occur on broad flat ridgetops. This community occurs west of the Mississippi River in west-central Louisiana and eastern Texas, particularly on the Pleistocene Intermediate and High Terraces, and also possibly on the Fleming Formation. This is a pyrogenic community with fire-return intervals of 2-5 years. |
Comm #6982
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Fagus grandifolia - Liquidambar styraciflua - Quercus (michauxii, nigra) Forest
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accession code: VB.CC.20618.FAGUSGRANDIFOLI
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Southeastern Ecology Working Gro... |
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This levee or terrace forest of the Atlantic Coastal Plain is dominated by Fagus grandifolia, with Liquidambar styraciflua and some combination of the nominal Quercus spp. (Quercus michauxii, Quercus nigra) often codominating. Although they may be present, Liriodendron tulipifera and Betula nigra are usually not dominants in this community. Ilex opaca var. opaca is a prominent component of the subcanopy. Shrubs present include Leucothoe axillaris, Symplocos tinctoria, and Vaccinium elliottii. Vines are prominent in examples of this association; these include Berchemia scandens, Gelsemium sempervirens, Smilax laurifolia, Toxicodendron radicans, and Vitis rotundifolia. Scattered patches of Arundinaria gigantea may occur in examples of this community. Herbaceous species common in this association include Carex spp. and Mitchella repens. |
Comm #6983
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Populus balsamifera ssp. trichocarpa / Rubus spectabilis Woodland
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accession code: VB.CC.32976.CEGL003283
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Western Ecology Working Group of... |
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This plant association is common in southeastern and coastal south-central Alaska. It is found on newly exposed, well-drained gravels on outburst floodplains and active floodplains, and on dunes of outburst floodplains. Flooding occurs seasonally to rarely on the floodplains. It is dominated by relatively young (40-80 years old) <i>Populus balsamifera ssp. trichocarpa (= Populus trichocarpa )</i> up to 20 m (65 feet) tall. Spruce and cottonwood regeneration are uncommon in the thick shrub cover. <i>Alnus viridis ssp. sinuata (= Alnus sinuata)</i> and <i>Rubus spectabilis</i> often form a nearly impenetrable thicket between the widely spaced <i>Populus balsamifera ssp. trichocarpa</i> trees. Herbaceous species are sparsely represented, and the most common is <i>Circaea alpina</i>. This community is an early-seral type that may eventually be replaced by <i>Picea sitchensis</i> forest and, possibly, by a <i>Tsuga heterophylla</i> forest. |
Comm #6984
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Argentina egedii - Symphyotrichum subspicatum Herbaceous Vegetation
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accession code: VB.CC.34255.CEGL003288
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Western Ecology Working Group of... |
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Comm #6985
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Carex lyngbyei - Argentina egedii Herbaceous Vegetation
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accession code: VB.CC.33667.CEGL003289
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Western Ecology Working Group of... |
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Comm #6986
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Acer circinatum / Athyrium filix-femina - Tolmiea menziesii Shrubland
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accession code: VB.CC.34598.CEGL003291
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Western Ecology Working Group of... |
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Comm #6987
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Larrea tridentata Shrubland Alliance
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accession code: VB.CC.18023.LARREATRIDENTAT
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Western Ecology Working Group of... |
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The bulk of the distribution of this alliance in the United States is west of Texas, in New Mexico, Arizona, Nevada, and California. Stands found in southeastern to western Texas are on low-elevation flats below 1050 m (3500 feet). These shrublands are dominated by Larrea tridentata. Associated species in Texas can include Parthenium incanum, Atriplex canescens, Flourensia cernua, Agave lechuguilla, Bouteloua eriopoda, Bouteloua ramosa, Euphorbia antisyphilitica, Dasyochloa pulchella (= Erioneuron pulchellum), Flourensia cernua, Hechtia texensis, Jatropha dioica var. graminea, Opuntia schottii, Prosopis glandulosa, Tiquilia greggii, and Acacia spp. This alliance is also a widespread disturbance type that has spread into former desert grasslands and mixed shrublands. |
Comm #6988
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CEGL002774
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accession code: VB.CC.5150.CEGL002774
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
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Comm #6989
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Malus fusca - (Salix hookeriana) / Carex obnupta Shrubland
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accession code: VB.CC.33538.CEGL003294
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Western Ecology Working Group of... |
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According to Christy (2004), this association occurs in depressions in both deciduous and coniferous forests. Several examples of this association have been observed in the field but only one plot has been sampled. All trees are peripheral to the wetlands. The most typical expression known to the author is a dense, monotypic stand of <i>Malus fusca</i> with a monotypic understory of <i>Carex obnupta</i>. Depending on hydroperiod, the understory ranges from nearly 100% cover of <i>Carex obnupta</i> to very low cover of any other vegetation because of prolonged seasonal ponding. The plot reported here also contains <i>Salix geyeriana</i> and <i>Spiraea douglasii</i>. The association may have been more widespread historically, as large expanses of swamp vegetation once occurred in the northern Willamette and Tualatin valleys. These wetlands have not been sampled adequately. |
Comm #6990
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Sambucus mexicana Intermittently Flooded Shrubland [Placeholder]
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accession code: VB.CC.23512.SAMBUCUSMEXICAN
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Western Ecology Working Group of... |
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