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Name
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Reference
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Plots↓
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Description |
Comm #181
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Ceanothus megacarpus Shrubland
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accession code: VB.CC.37447.CEGL003562
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90
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This shrubland association occurs on moderate to steep slopes of variable aspect at low elevations between 53 and 730 m. It is characterized by a strong dominance of <i>Ceanothus megacarpus</i> in the shrub layer and an uncharacteristic and insignificant herbaceous layer. The emergent tree layer may include <i>Quercus agrifolia, Umbellularia californica</i>, and <i>Juglans californica</i>. |
Comm #182
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Utah Juniper Woodland Alliance
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accession code: VB.cc.30589.UTAHJUNIPERWOOD
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NVC 2004 |
89
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Comm #183
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Salicornia (depressa, bigelovii, maritima) - Spartina alterniflora Salt Marsh
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accession code: urn:lsid:vegbank.org:commConcept:33141-{8CB03F24-0F72-4607-9DDA-C71EEC4DE5AF}
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NatureServe Biotics 2019 |
88
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This association represents tidally flooded hypersaline flats or very shallow depressions (pannes) dominated by succulents and other halophytic herbs, including <i>Salicornia depressa, Salicornia bigelovii, Salicornia maritima</i>, and stunted <i>Spartina alterniflora</i>, that occur in salt marshes of the Atlantic coast. Vegetation of this association tends to develop in shallow depressions within high or salt marshes where drainage is poor. The depressions are regularly to irregularly flooded by high tides, but as the water evaporates during low tide, the salinity concentration increases forming "salt pannes." Formation of the pannes may result from ice-scouring, rafting flotsam, peat compaction, mosquito ditch levees, or erosion of tidal creek banks, which create small, sparsely vegetated to unvegetated impoundments. Bare peat and/or mucky soils are prevalent (up to 85% bare soils). Total vegetative cover is variable in pannes, from near total absence of vascular plants to a dense cover of <i>Salicornia depressa, Salicornia bigelovii, Salicornia maritima</i>, or <i>Spartina alterniflora</i> (short form). Common associates include <i>Limonium carolinianum, Plantago maritima var. juncoides, Triglochin maritima, Spartina patens, Suaeda maritima</i>, and <i>Atriplex</i> spp. <i>Borrichia frutescens</i> can be an occasional component in Virginia. Algal mats are characteristically present, visible even in densely vegetated pannes. Blue-green algae are an important component of these mats, in some cases contributing significantly more biomass to the community than do vascular species. Diagnostic species include <i>Salicornia bigelovii</i> and <i>Salicornia depressa</i>. |
Comm #184
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Quercus alba - Quercus rubra - Carya (ovata, carolinae-septentrionalis) / Cercis canadensis Forest
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accession code: urn:lsid:vegbank.org:commConcept:35503-{C2C3764D-9DD8-4648-8545-DFA9548CE95B}
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NatureServe Biotics 2019 |
88
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This dry-mesic forest occurs on base-rich, well-drained soils in the southern Piedmont. Stands are dominated by <i>Quercus alba</i> and often <i>Quercus rubra, Carya ovata</i>, or <i>Carya carolinae-septentrionalis</i> in combination with other species of <i>Quercus</i> and <i>Carya</i> (i.e., <i>Quercus velutina, Carya tomentosa, Carya glabra</i>). Other overstory and understory species that may occur include <i>Fraxinus americana, Liquidambar styraciflua, Carya ovalis, Liriodendron tulipifera, Juniperus virginiana var. virginiana, Cercis canadensis, Cornus florida, Viburnum rafinesqueanum, Viburnum prunifolium, Ostrya virginiana, Chionanthus virginicus, Ulmus americana, Carpinus caroliniana, Pinus taeda</i>, and <i>Pinus echinata</i>. Proportions of <i>Liquidambar styraciflua, Liriodendron tulipifera, Acer rubrum</i>, and <i>Pinus</i> spp. increase following disturbance. Herbaceous species and vines that may occur within this community include <i>Desmodium nudiflorum, Galium circaezans, Maianthemum racemosum ssp. racemosum, Polygonatum biflorum var. biflorum, Uvularia perfoliata, Aristolochia serpentaria, Scleria oligantha, Botrychium virginianum, Agrimonia rostellata, Bromus pubescens, Carex albicans, Carex laxiflora var. laxiflora, Carex planispicata, Dichanthelium boscii, Elymus hystrix var. hystrix, Festuca subverticillata, Scutellaria elliptica</i>, and <i>Tiarella cordifolia var. collina</i>. Other stands have high cover of scrambling vines, such <i>Parthenocissus quinquefolia, Bignonia capreolata</i>, and <i>Vitis rotundifolia</i>, that preclude a diversity of herbaceous species. |
Comm #185
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Pinus strobus - Quercus (coccinea, montana) / (Gaylussacia ursina, Vaccinium stamineum) Forest
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accession code: urn:lsid:vegbank.org:commConcept:35721-{27E16800-706E-4E5C-8EB1-D146E1823452}
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NatureServe Biotics 2019 |
88
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This community occurs on exposed upper slopes and ridgetops at elevations below 915 m (3000 feet) in the southern Appalachian Mountains. This association represents mixed forests with <i>Pinus strobus, Quercus montana</i>, and <i>Quercus coccinea</i>, occurring singly or in combination, each contributing 25-75% of the total canopy coverage. Open subcanopies are composed of <i>Oxydendrum arboreum, Acer rubrum var. rubrum, Nyssa sylvatica</i>, and <i>Cornus florida</i>. The shrub stratum is dominated by deciduous heath species, typically <i>Gaylussacia ursina</i> or <i>Vaccinium stamineum</i>. Other species in the shrub/sapling stratum may include <i>Vaccinium pallidum, Eubotrys recurva, Kalmia latifolia, Castanea dentata</i>, or <i>Acer rubrum var. rubrum</i>. On rocky sites, <i>Deschampsia flexuosa</i> may be common. |
Comm #186
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Quercus berberidifolia Shrubland
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accession code: VB.CC.37437.CEGL003716
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87
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This shrubland occurs on gentle to very steep northwest- and northeast-facing slopes at elevations between 353 and 1676 m (1158-5500 feet). The topography is variable, and the ground cover contains a moderate to high litter content. Parent material is sedimentary, granitic, metamorphic, gabbro diorite, or metavolcanic. Soil texture varies from loamy sand, silt loam, to clay. It is characterized by strong dominance of <i>Quercus berberidifolia</i> in the shrub layer. Other shrub species may be present in low cover, such as <i>Adenostoma fasciculatum, Arctostaphylos glauca, Eriogonum fasciculatum, Fraxinus dipetala, Heteromeles arbutifolia, Rhamnus crocea</i>, and <i>Salvia mellifera</i>. The herbaceous layer is sparse and has no characteristic species, the most common being non-natives such as <i>Hirschfeldia incana, Bromus diandrus, Bromus madritensis</i>, or <i>Bromus tectorum</i>. An emergent tree layer includes <i>Quercus agrifolia</i> in some stands. |
Comm #187
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PSEUDOTSUGA MENZIESII WOODLAND ALLIANCE
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accession code: VB.CC.17115.PSEUDOTSUGAMENZ
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Jennings 2003. Vegetation alliances: composition and function. |
87
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Comm #188
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SALIX EXIGUA SEASONALLY FLOODED SHRUBLAND ALLIANCE
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accession code: VB.cc.30542.SALIXEXIGUASEAS
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NVC 2004 |
87
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Comm #189
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PSEUDOTSUGA MENZIESII WOODLAND ALLIANCE
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accession code: VB.CC.8659.PSEUDOTSUGAMENZ
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Jennings 2003. Vegetation alliances: composition and function. |
87
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Comm #190
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Amelanchier alnifolia Shrubland Alliance
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accession code: VB.cc.30607.AMELANCHIERALNI
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NVC 2004 |
86
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