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Description |
Comm #6121
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Arctostaphylos glandulosa - Quercus wislizeni Shrubland
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accession code: VB.CC.34667.CEGL003180
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Western Ecology Working Group of... |
0
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This shrubland association is currently only known from Point Reyes National Seashore in California, and the following description is based on occurrences there. Additional information will be added as it becomes available. This association is found at low elevations on the upper third or ridgetops of 15- to 22-degree slopes with south-southeast aspects. Soil textures range from generally moderately fine sandy clay loam to moderately coarse, sandy loam of sandstone or siltstone origin. These slopes are generally gravelly or cobbly. Most stands are above the average level of summer fog. Stands of this shrubland form an open understory herb layer and an open to continuous shrub layer. <i>Arctostaphylos glandulosa</i> and <i>Quercus wislizeni</i> are dominant. <i>Lonicera hispidula, Aira caryophyllea, Diplacus aurantiacus (= Mimulus aurantiacus)</i>, and <i>Lithocarpus densiflorus</i> are also present. Additional species, contributing little cover, vary and may include <i>Umbellularia californica, Adenostoma fasciculatum, Heteromeles arbutifolia, Melica torreyana, Galium nuttallii, Holcus lanatus, Pellaea mucronata, Ceanothus cuneatus, Bromus diandrus, Agrostis hallii, Iris</i> sp., <i>Ceanothus</i> sp., <i>Vaccinium ovatum, Lepechinia calycina</i>, and <i>Pteridium aquilinum</i>. <i>Quercus wislizeni</i> may act as a shrub or a small tree in this association, probably reflecting varying moisture and fire history among stands. |
Comm #6122
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Juniperus coahuilensis Woodland Alliance
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accession code: VB.CC.18167.JUNIPERUSCOAHUI
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Western Ecology Working Group of... |
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This alliance includes woodlands dominated by Juniperus coahuilensis (= Juniperus erythrocarpa), occurring with a well-developed herbaceous stratum, with little, if any, shrub cover. Common associates include Quercus turbinella, Canotia holacantha, Quercus grisea, Quercus emoryi, Mimosa dysocarpa, Rhus trilobata, Bouteloua curtipendula, Bouteloua gracilis, Bouteloua chondrosioides, Bouteloua eriopoda, Muhlenbergia setifolia, Muhlenbergia emersleyi, Schizachyrium cirratum, Schizachyrium sanguineum var. hirtiflorum, Schizachyrium scoparium var. scoparium (= Schizachyrium scoparium ssp. neomexicanum), Lycurus sp., Bothriochloa barbinodis (= var. barbinodis), Eragrostis intermedia, and Liatris punctata. These woodlands often occur in association with Bouteloua-dominated grasslands in western Texas, New Mexico, and Arizona. |
Comm #6123
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Pinus cembroides - Quercus grisea - Quercus emoryi - Juniperus flaccida / Salvia regla / Bouteloua curtipendula Woodland
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accession code: VB.CC.19746.PINUSCEMBROIDES
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Southeastern Ecology Working Gro... |
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This community occurs in lower to moderate elevations in the Chisos Mountains of Trans-Pecos Texas. It may also range into the mountains of northern Coahuila, Mexico. The canopy is open to fairly closed, and is dominated by Pinus cembroides, Quercus grisea, Quercus emoryi, and Juniperus flaccida. Salvia regla and Agave havardiana are prominent components of the shrub stratum. Bouteloua curtipendula is the dominant grass. |
Comm #6124
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Sporobolus wrightii Herbaceous Vegetation
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accession code: VB.CC.22584.SPOROBOLUSWRIGH
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Southeastern Ecology Working Gro... |
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This association includes saline grasslands occurring in the lower Rio Grande Valley, characterized by Sporobolus wrightii. This vegetation occurs at the base of many clay dunes (lomas). It may also form a continuous cover on low-elevation lomas with only scattered emergent shrubs. It often grades downward into vegetation dominated by Spartina spartinae, Spartina patens, Batis maritima, or Borrichia frutescens. Other species occurring in this community may include Spartina spartinae and emergent Yucca treculeana. This grassland occurs on clayey substrates at the wetland/upland boundary, and the hydrology is unclear. |
Comm #6125
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V.A.1.N.j
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accession code: VB.CC.433.VA1NJ
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EcoArt 2002 |
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Comm #6126
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CEGL000476
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accession code: VB.CC.3089.CEGL000476
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
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Comm #6127
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Quercus nigra Ruderal Forest
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accession code: VB.CC.35312.CEGL004638
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Southeastern Ecology Working Gro... |
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This community is a result of disturbance and/or fire suppression of upland pinelands of the southeastern Coastal Plain and of pinelands and subsequent old fields in the adjacent Piedmont areas. This association occurs on mesic or dry-mesic sites, especially on loamy or other fine-textured soils (in contrast to ~<i>Quercus hemisphaerica - Quercus nigra</i> Forest Alliance (A0053)$$, which occurs primarily on coarse-textured sands in drier situations). <i>Quercus nigra</i> dominates the tree canopy. Other oaks (e.g., <i>Quercus falcata, Quercus phellos, Quercus hemisphaerica</i>) may be intermixed, as well as <i>Liquidambar styraciflua</i>, remnant <i>Pinus palustris</i>, weedy <i>Pinus elliottii var. elliottii, Carya</i> spp., or <i>Pinus taeda</i>. In the Upper Gulf Coastal Plain of Georgia, some examples may contain <i>Fagus grandifolia, Liriodendron tulipifera, Carya alba</i>, and <i>Cornus florida</i> in the subcanopy. |
Comm #6128
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Populus tremuloides / Alnus incana - Salix spp. Forest
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accession code: VB.CC.32655.CEGL001082
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Western Ecology Working Group of... |
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Comm #6129
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CEGL000296
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accession code: VB.CC.2920.CEGL000296
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
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Comm #6130
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A.1912
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accession code: VB.CC.1613.A1912
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
0
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This alliance includes a variety of dry, dry-mesic, and mesic forests, dominated by ~Quercus muehlenbergii$ and possibly ~Acer saccharum$, the canopy often also including other hardwood species associated with high base substrates (e.g., limestone or dolomite) under a variety of moisture conditions. These include ~Quercus alba, Quercus shumardii, Fraxinus americana, Fraxinus quadrangulata, Acer barbatum, Tilia americana, Carya$ spp., ~Juglans nigra$, and ~Liriodendron tulipifera$ (in the more interior portions of the alliance's distribution), and ~Quercus sinuata var. sinuata$ and ~Carya myristiciformis$ (in the southwestern, Coastal Plain portion of the alliance's distribution). The habitat of this alliance includes mesic and dry-mesic forests over limestones in the Nashville Basin of Tennessee, dry-mesic slopes associated with prairie openings in Louisiana, moist limestone slopes in the Edwards Plateau of Texas, blackland soils in the upper West Gulf Coastal Plain of Arkansas, lowlands and mesic slopes of Oklahoma and adjacent Arkansas, as well as related habitats in states farther east (e.g., Alleghenies and lower Cumberland Plateau escarpment). Forests in Kentucky and Tennessee have ~Quercus shumardii$ and ~Frangula caroliniana$ and occur over limestone on south-facing slopes. There are scattered occurrences on benches and clifftops on the Daniel Boone National Forest. In the Coastal Plain of Virginia, this alliance is represented by somewhat open canopy 'shell barren' forests dominated by ~Quercus muehlenbergii$ with ~Acer barbatum$. On rare occurrences of limestone in the Southern Blue Ridge of North Carolina, ~Quercus muehlenbergii$ occurs with ~Juglans nigra, Fraxinus americana$, and ~Acer saccharum$. Understory species may include ~Cornus florida, Cercis canadensis, Calycanthus floridus, Cornus alternifolia, Ostrya virginiana$, and ~Hydrangea arborescens$. In the Northeast, the shrub layer is sparse and may contain ~Hamamelis virginiana, Zanthoxylum americanum$, and ~Cornus alternifolia$. In some more southerly examples, shrubs may include ~Forestiera ligustrina, Frangula caroliniana$, and ~Symphoricarpos orbiculatus$. The herbaceous layer may contain ~Asclepias quadrifolia, Clematis occidentalis (= Clematis verticillaris)$ (in northeastern examples), ~Packera obovata (= Senecio obovatus), Phryma leptostachya, Saxifraga virginiensis, Arabis laevigata$, and ~Triosteum aurantiacum$. Two unusual communities of this alliance are lowland forests from the Upper West Gulf Coastal Plain of Arkansas. In the Northeast, the habitat is characterized as upper slopes or summits of limestone or marble ridges with dry soil-moisture regimes. Limestone outcrops or boulders may be present, as well as Karst collapse features. In the Southeast, mesic to dry limestone-derived soils may occur as well on flatter landforms, as in the Nashville Basin of Tennessee. In the Southeast, this vegetation is known from the Ridge and Valley, lower Cumberland Plateau escarpment, Highland Rim escarpment, and Nashville Basin in Tennessee; the Highland Rim, Bluegrass and Dripping Springs escarpment in Kentucky; the Cumberland Plateau in Alabama; as well as rarely in the Southern Blue Ridge and Coastal Plain. Isolated occurrences are reported in northern Arkansas on moderately shallow soils, often on glade margins. It also occurs in the Arbuckle Mountains of Oklahoma and the Edwards Plateau of Texas. If this alliance occurs in the Upper East Gulf Coastal Plain, stands would contain ~Acer barbatum$ instead of ~Acer saccharum$. |
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