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Add/Drop	Name	Reference	Plots↓	Description
Comm #7841	Pinus rigida / Quercus ilicifolia / Piptatherum pungens Woodland » more details accession code: VB.CC.31264.CEGL006203	Eastern Ecology Working Group of...	0	This northernmost pitch pine - scrub oak barren community occurs on flat glacial outwash plains. Soils are typically sandy, well-drained and nutrient poor. A local history of fire is essential to the maintenance of the community. An open canopy, 30-70%, of <i>Pinus rigida</i> over a dense, patchy, tall-shrub layer (25-95%) of <i>Quercus ilicifolia</i> forms the characteristic structure of this community. In places the canopy may also contain <i>Quercus rubra, Pinus strobus, Betula populifolia</i> and occasionally <i>Picea rubens</i> or <i>Abies balsamea</i>. A short-shrub layer of <i>Vaccinium angustifolium, Comptonia peregrina, Pteridium aquilinum</i> and <i>Gaultheria procumbens</i> is usually present. Herbaceous species are scattered and generally more dense where the scrub oak is discontinuous. Characteristic herbs include <i>Piptatherum pungens (= Oryzopsis pungens), Oryzopsis asperifolia, Carex lucorum, Schizachyrium scoparium, Sibbaldiopsis tridentata</i> and <i>Danthonia spicata</i>. Occasional species include <i>Vaccinium myrtilloides, Arctostaphylos uva-ursi, Comandra umbellata</i> and <i>Corylus</i> sp. An interesting variant of this community containing <i>Pinus resinosa</i> in the canopy occurs on eskers and outwash plains in New Hampshire.
Comm #7842	Tsuga heterophylla - Thuja plicata / Polystichum munitum Forest » more details accession code: VB.CC.37214.CEGL003228	DeMeo, T., J. Martin, and R. A. ...	0
Comm #7843	Amelanchier alnifolia Shrubland Alliance » more details accession code: VB.CC.18223.AMELANCHIERALNI	Western Ecology Working Group of...	0	This alliance is found in the western United States and south-central Canada. It occurs predominantly in the West and requires rangewide review for a complete description. In the Midwest, it is characterized by moderate cover (>25%) of shrubs, most of which are approximately 1 m tall. Mixedgrass prairie species occupy the spaces between the shrubs. Dominant shrubs include Amelanchier alnifolia, Prunus virginiana, and Symphoricarpos occidentalis. Typical herbaceous species include Pascopyrum smithii, Hesperostipa comata (= Stipa comata), and other species characteristic of mixedgrass prairie.
Comm #7844	Acer saccharum - (Fraxinus americana) / Arisaema triphyllum Forest » more details accession code: VB.CC.31403.CEGL006211	Eastern Ecology Working Group of...	0	These are northern hardwood forests of slightly enriched soils in the northern Appalachian Mountains and adjacent northeastern United States and Canada. They occur at moderate elevations of 245 to 610 m (800-2000 feet) on slightly enriched soils, often silt loams derived from pelite or other subacidic bedrock. Ridgetops and slight concavities on hillslopes are both typical settings. They may occur as inclusions within typical northern hardwood forests or may occur over larger areas and be the locally dominant northern hardwood forest. The closed-canopy forest has sparse to moderate shrub cover, moderate herb cover, and may have local carpets of <i>Acer saccharum</i> seedlings in the ground vegetation. Bryoids are a minor component of the forest floor. The canopy is dominated by <i>Acer saccharum</i>, frequently with <i>Fraxinus americana</i> as an associate or even canopy codominant. Other associated hardwood species include <i>Betula alleghaniensis</i> and <i>Betula lenta</i>. <i>Fagus grandifolia</i> is often present but less abundant than in matrix northern hardwood forests. <i>Liriodendron tulipifera</i> may occur in southern New England. Conifers are usually sparse. Shrubs can include <i>Cornus alternifolia, Lindera benzoin, Sambucus racemosa (= Sambucus pubens), Acer pensylvanicum</i>, and <i>Ostrya virginiana</i>. Typical herbs of this semi-rich type, which are scarce or absent from standard beech-birch-maple forests, include <i>Arisaema triphyllum, Viola rotundifolia, Tiarella cordifolia, Actaea pachypoda, Osmunda claytoniana, Osmunda cinnamomea, Carex laxiculmis, Carex platyphylla, Carex pedunculata, Eurybia divaricata, Botrychium</i> spp., and <i>Solidago flexicaulis</i>. These forests are intermediate in nutrient regime and composition between <i>~Acer saccharum - Fraxinus americana - Tilia americana / Acer spicatum / Caulophyllum thalictroides</i> Forest (CEGL005008)$$ and <i>~Acer saccharum - Betula alleghaniensis - Fagus grandifolia / Viburnum lantanoides</i> Forest (CEGL006252)$$. They are more depauperate than other communities of this alliance, for example lacking rich-soil indicators such as <i>Adiantum pedatum, Caulophyllum thalictroides</i>, and <i>Tilia americana</i> that are typical of CEGL005008.
Comm #7845	A.1047 » more details accession code: VB.CC.818.A1047	EcoArt 2002	0
Comm #7846	Picea sitchensis / Polystichum munitum Forest » more details accession code: VB.CC.24370.PICEASITCHENSIS	Western Ecology Working Group of...	0
Comm #7847	Artemisia tridentata ssp. tridentata / Festuca idahoensis Shrubland » more details accession code: VB.CC.24558.ARTEMISIATRIDEN	Western Ecology Working Group of...	0
Comm #7848	CEGL003058 » more details accession code: VB.CC.5269.CEGL003058 NOT CURRENTLY ACCEPTED	EcoArt 2002	0
Comm #7849	A.150 » more details accession code: VB.CC.1269.A150 NOT CURRENTLY ACCEPTED	EcoArt 2002	0
Comm #7850	Alnus serrulata - Physocarpus opulifolius Shrubland » more details accession code: VB.CC.31431.CEGL006251	Eastern Ecology Working Group of...	0	This community is a floodplain alder thicket of the Central Appalachians, High Alleghenies and Western Allegheny Plateau regions. In the Central Appalachians, these are shrub thickets dominated by <i>Alnus serrulata</i> along rivers and streams on rocky shoals and gravel bars. This shrub thicket of the Western Allegheny Plateau occurs on circumneutral to somewhat calcareous substrates. Soils are generally mineral with a thin organic layer. The vegetation typically occurs in a variety of environmental settings, including upland edge of marshes, adjacent to red maple wetlands, small upland depressions, and at the base of slopes. The canopy is characterized by <i>Alnus serrulata</i> and <i>Physocarpus opulifolius</i>, the latter generally contributing less cover in relation to <i>Alnus</i>. Woody associates include <i>Salix</i> spp., <i>Sambucus canadensis, Cornus amomum, Rhododendron viscosum, Decodon verticillatus, Cephalanthus occidentalis</i>, or <i>Ilex verticillata</i>. Herbaceous species may include <i>Osmunda regalis, Thelypteris palustris, Typha latifolia, Peltandra virginica</i>, or <i>Carex stricta</i>.