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Add/Drop	Name	Reference	Plots↓	Description
Comm #6781	Hypericum reductum / Aristida stricta Dwarf-shrubland » more details accession code: VB.CC.35932.CEGL003954	Southeastern Ecology Working Gro...	0	This association represents very small-scale and localized depressions or swales in extremely xeric sandhills in southeastern North Carolina. <i>Hypericum reductum</i> dominates the shrub layer, while other scattered shrubs such as <i>Lyonia mariana</i> and <i>Gaylussacia dumosa (= var. dumosa)</i> may be present. <i>Aristida stricta</i> and <i>Andropogon</i> spp. are the dominant herbs. In this landscape, <i>Aristida stricta</i> is restricted to this community, apparently because of the extremely xeric conditions of the surrounding sandhill community [see ~<i>Pinus palustris / Quercus laevis / Aristida purpurascens - Stipulicida setacea - (Rhynchospora megalocarpa, Selaginella acanthonota)</i> Woodland (CEGL003590)$$].
Comm #6782	Dasiphora fruticosa ssp. floribunda / Carex interior - Carex flava - Sarracenia purpurea Shrub Herbaceous Vegetation » more details accession code: VB.CC.36998.CEGL005140	Midwestern Ecology Working Group...	0	This rich fen community is found in areas near the eastern Great Lakes, including the Allegheny region of the United States and elsewhere in adjacent Canada. Stands occur on level to sloping seepage areas. Sites are minerotrophic and alkaline to circumneutral in character, with groundwater flowing through shallow peats and marls on glacial deposits. Graminoids dominate, though forbs and dwarf-shrubs can be prominent. A tall-shrub layer swamp often surrounds the core fen area. Typical graminoids include the sedges <i>Carex aquatilis, Carex flava, Carex interior, Carex leptalea, Carex lacustris, Carex hystericina, Carex sterilis</i>, and <i>Carex stricta</i>, as well as <i>Cladium mariscoides, Eleocharis rostellata, Eriophorum viridicarinatum</i>. Other herbaceous species include <i>Symphyotrichum puniceum (= Aster puniceus), Doellingeria umbellata (= Aster umbellatus), Cypripedium reginae, Muhlenbergia glomerata, Oxypolis rigidior, Platanthera dilatata, Pycnanthemum virginianum, Solidago patula, Solidago uliginosa, Thalictrum dasycarpum</i>, and <i>Thelypteris palustris</i>. Shrubs most characteristic of this type include <i>Dasiphora fruticosa ssp. floribunda (= Pentaphylloides floribunda)</i> and <i>Rhamnus alnifolia</i>, but <i>Photinia melanocarpa (= Aronia melanocarpa), Alnus incana, Cornus amomum, Cornus foemina, Salix candida, Salix sericea</i>, and <i>Viburnum lentago</i> can also be found. A moss layer is commonly well-developed, and may or may not contain species of <i>Sphagnum</i>. The open marl area is often sparsely vegetated, but can contain <i>Chara</i> spp., <i>Juncus brachycephalus, Lobelia kalmii, Parnassia glauca, Rhynchospora capillacea, Sarracenia purpurea, Triglochin maritima</i>, and <i>Triglochin palustris</i>.
Comm #6783	CEGL001760 » more details accession code: VB.CC.4317.CEGL001760 NOT CURRENTLY ACCEPTED	EcoArt 2002	0
Comm #6784	CEGL006348 » more details accession code: VB.CC.6844.CEGL006348 NOT CURRENTLY ACCEPTED	EcoArt 2002	0
Comm #6785	Thuja occidentalis - Fraxinus nigra Forest » more details accession code: VB.CC.36648.CEGL005165	Midwestern Ecology Working Group...	0	This white-cedar - black ash forest is found in the hemi- and sub-boreal regions of the Great Lakes in the United States and Canada where it occurs on wet, saturated soils. Substrate is well-decomposed peat and hummocky topography is present. Canopy cover is variable, sometimes fairly open. <i>Thuja occidentalis</i>, with or without <i>Fraxinus nigra</i>, dominates the canopy (some stands may have <i>Fraxinus</i> in the upper canopy and <i>Thuja</i> in the lower canopy). <i>Populus tremuloides</i> can be a major component, but this may be caused by logging of <i>Thuja occidentalis</i>. <i>Acer rubrum, Betula alleghaniensis</i>, and <i>Picea glauca</i> may also be present. Shrubs include <i>Acer spicatum, Cornus alternifolia, Lonicera canadensis, Ribes</i> spp., and <i>Rubus pubescens</i>. The herb layer includes <i>Aralia nudicaulis, Arisaema triphyllum, Clintonia borealis, Cornus canadensis, Dryopteris carthusiana, Galium triflorum, Maianthemum canadense, Tiarella cordifolia</i> and <i>Trientalis borealis</i>.
Comm #6786	Pinus banksiana - (Picea mariana) - Mixed Hardwoods / Sphagnum spp. Forest » more details accession code: VB.CC.36838.CEGL005166	Midwestern Ecology Working Group...	0	This jack pine swamp community is found in the upper Great Lakes region of the United States and Canada. Stands are found on poorly drained lowland sites, including those on sand plains. This type appears to originate following a catastrophic burn in a <i>Picea mariana</i> swamp. The canopy is dominated by <i>Pinus banksiana</i> with varying amounts of <i>Picea mariana</i>. The shrub layer is dominated by ericaceous shrubs, including <i>Chamaedaphne calyculata, Gaultheria hispidula, Ledum groenlandicum, Vaccinium angustifolium</i>, and <i>Vaccinium myrtilloides</i>. <i>Abies balsamea</i> and <i>Picea mariana</i> may also occur in scrub form in this layer. Herbaceous species include <i>Clintonia borealis, Coptis trifolia, Cornus canadensis, Maianthemum canadense, Maianthemum trifolium</i>, and others. The moss layer contains a variety of <i>Sphagnum</i> spp. and feathermosses.
Comm #6787	Fagus grandifolia - Acer saccharum - Quercus bicolor - Acer rubrum Flatwoods Forest » more details accession code: VB.CC.36924.CEGL005173	Midwestern Ecology Working Group...	0	This community is found in the central midwestern United States and possibly adjacent Canada. Stands occur on flat to undulating till or clay plains with imperfectly to poorly drained and aerated soils. This community is dominated by trees that can be found in both upland and lowland sites. Among the most common are <i>Acer rubrum, Acer saccharum, Fagus grandifolia, Quercus bicolor, Quercus macrocarpa</i>, and <i>Ulmus rubra</i>. Associates include <i>Carya ovata, Carya cordiformis, Celtis occidentalis, Fraxinus pennsylvanica, Liriodendron tulipifera, Quercus rubra, Quercus shumardii</i>, and <i>Ulmus americana</i>. Typical shrub species include <i>Asimina triloba, Euonymus obovatus</i>, and <i>Lindera benzoin</i>. The herbaceous layer includes <i>Arisaema triphyllum (= Arisaema atrorubens), Actaea pachypoda, Circaea x intermedia (= Circaea canadensis), Galium</i> spp., and <i>Pilea pumila</i>, among others.
Comm #6788	Schizachyrium scoparium - Sorghastrum nutans - Bouteloua curtipendula Hill Herbaceous Vegetation » more details accession code: VB.CC.36736.CEGL005183	Midwestern Ecology Working Group...	0	This glacial drift and loess hill prairie is found in the northern and central prairie-forest border region of the United States, in Illinois. Stands occur on hills formed from eroded glacial drift or on deep loess deposits. These are usually found above rivers and streams. The sites are typically on steep, south- or west-facing slopes with well-drained to somewhat excessively drained soil. This community is dominated by medium-tall graminoids. <i>Bouteloua curtipendula, Schizachyrium scoparium</i>, and <i>Sorghastrum nutans</i> are the dominant species. <i>Andropogon gerardii</i> is also common, especially where moisture is more favorable. Other characteristic species include <i>Asclepias viridiflora, Brickellia eupatorioides (= Kuhnia eupatorioides), Desmodium ciliare, Euphorbia corollata, Hedyotis nigricans var. nigricans, Lespedeza capitata, Linum sulcatum, Lithospermum incisum, Penstemon pallidus, Psoralidium tenuiflorum (= Psoralea tenuiflora), Sisyrinchium campestre, Spiranthes magnicamporum</i>, and <i>Solidago nemoralis</i>. Woody species are infrequent. <i>Sassafras albidum, Quercus stellata</i> (more southern), <i>Ceanothus americanus, Rhus glabra</i>, and <i>Rhus copallinum</i> may be encountered.
Comm #6789	Populus balsamifera ssp. trichocarpa - Fraxinus latifolia Forest » more details accession code: VB.CC.32948.CEGL000674	Western Ecology Working Group of...	0
Comm #6790	Populus balsamifera (ssp. trichocarpa, ssp. balsamifera) / Symphoricarpos (albus, oreophilus, occidentalis) Forest » more details accession code: VB.CC.32038.CEGL000677	Western Ecology Working Group of...	0	This association is known from the Blue Mountains of eastern Oregon, through the Columbia Basin to the Cascades of eastern Washington, into central and northern Idaho, western Wyoming, and north to the mountains of southern British Columbia. This late-seral association typically occurs at low elevations from 579 to 2040 m (1900-6693 feet) in broad mountain valleys and canyons of low- to moderate-gradient streams and rivers. The association occupies alluvial terraces with deep silty loam soils (over cobble and gravel) on infrequently flooded sites well above the average high-water line and summer water table. Tall and mature <i>Populus balsamifera ssp. trichocarpa</i> form the open to closed overstory canopy, with occasional understory asexual reproduction and conifers present. Conifer species, especially <i>Pinus ponderosa</i> and <i>Pseudotsuga menziesii</i>, may indicate the potential successional pathway on these relatively dry terrace sites. The shrub layer is clearly dominated by one species of <i>Symphoricarpos</i>, either <i>Symphoricarpos albus, Symphoricarpos oreophilus</i>, or <i>Symphoricarpos occidentalis</i> (usually with at least 20% cover), although a variety of other tall and medium shrubs (all with cover less than <i>Symphoricarpos albus</i>) are often present. The most consistently prominent shrubs are <i>Acer glabrum, Amelanchier alnifolia, Crataegus douglasii, Philadelphus lewisii, Prunus virginiana, Rosa</i> spp., and <i>Rubus parviflorus</i>, the presence of which may reflect successional relationships with other alluvial terrace associations. The herbaceous layer is diverse, but has only moderate cover, and often includes exotic species indicative of past disturbance. Perennial grasses, especially <i>Elymus glaucus, Phalaris arundinacea</i>, and <i>Poa pratensis</i>, often codominate with various tall forbs and <i>Equisetum</i> spp. The most important forbs include <i>Clematis ligusticifolia, Heracleum maximum, Maianthemum</i> spp., <i>Thalictrum occidentale</i>, and <i>Urtica dioica</i>.