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Add/Drop	Name	Reference	Plots↓	Description
Comm #7731	Abies concolor / Juniperus communis Forest » more details accession code: VB.CC.34534.CEGL000249	Western Ecology Working Group of...	0	This montane forest association occurs on a wide variety of aspects, slopes and landforms and is found in southern Utah on the Markagunt, Sevier and Paunsaugunt plateaus, in the Escalante and Tushar mountains and in the southern Rocky Mountains in northern New Mexico. Sites range between 2400 and 2850 m (7900-9360 feet) in elevation. Soils are often gravelly, rapidly drained loams (sandy to silty clay loams) and silts. Litter accumulations tend to be high but may be non-uniform and patchy. The vegetation is characterized by an open to closed tree canopy (10-70% cover) that is dominated or codominated by <i>Abies concolor</i> with a sparse to moderately dense understory dominated by clumps of the short shrub <i>Juniperus communis</i>. <i>Pseudotsuga menziesii</i> is frequently a codominant with other trees such as <i>Picea pungens, Pinus flexilis, Pinus strobiformis</i> (southern latitudes), <i>Populus tremuloides</i>, and <i>Juniperus scopulorum</i>. <i>Abies lasiocarpa</i> and <i>Pinus ponderosa</i> are accidental in the tree canopy and have relatively low cover. Other shrubs include scattered <i>Symphoricarpos oreophilus, Shepherdia canadensis, Rosa woodsii, Ribes cereum, Paxistima myrsinites, Mahonia repens (= Berberis repens)</i>, or <i>Ceanothus martinii</i>. <i>Acer glabrum</i> is typically absent. The herbaceous layer is generally depauperate but can range as high as 10% cover in some stands. <i>Carex rossii, Carex inops ssp. heliophila, Bromus anomalus</i>, and <i>Poa fendleriana</i> are the most consistent species.
Comm #7732	Populus tremuloides / Pteridium aquilinum Forest » more details accession code: VB.CC.20592.POPULUSTREMULOI	Western Ecology Working Group of...	0	This type is found in the Rocky Mountain Front Range and Black Hills of the United States. In the Black Hills, stands are found on flat to gently sloping or rolling topography of variable aspect, at higher elevations in the Central Core, Limestone Plateau, Minnekahta Foothills and Bear Lodge Mountains. Aspen stands are best developed and extend to lower elevations in the northern part of the range, including the Bear Lodge Mountains. Populus tremuloides is the dominant tree. Picea glauca or Pinus ponderosa may occur in this community as emergent trees. Shrub coverage is typically sparse, and herbaceous cover is high, often greater than 50%. Only Pteridium aquilinum has been found to be consistent and abundant in the understory in stands of this type, with coverage often greater than 50%. The shrub and herbaceous strata are otherwise variable. Among the more commonly found species are Corylus cornuta, Amelanchier alnifolia, Melica subulata, Anaphalis margaritacea, and Pyrola elliptica.
Comm #7733	Trichophorum caespitosum Saturated Shrub Herbaceous Alliance » more details accession code: VB.CC.21825.TRICHOPHORUMCAE	Eastern Ecology Working Group of...	0	Alpine bunchgrass meadows.
Comm #7734	Non-tidal Mud Flat Seasonally/Temporarily Flooded Sparsely Vegetated Alliance » more details accession code: VB.CC.18001.NONTIDALMUDFLAT	Midwestern Ecology Working Group...	0	This is technically not an alliance. It is a placeholder for a group of sparsely vegetated associations that do not have adequate vegetation descriptions, but do share certain substrate characteristics.
Comm #7735	Abies concolor - Pseudotsuga menziesii / Holodiscus discolor Forest » more details accession code: VB.CC.18210.ABIESCONCOLORPS	Western Ecology Working Group of...	0
Comm #7736	Nyssa biflora Seasonally Flooded Woodland Alliance » more details accession code: VB.CC.20571.NYSSABIFLORASEA	Southeastern Ecology Working Gro...	0	This alliance contains seasonally flooded woodlands that are dominated by Nyssa biflora. Other tree species that may be present include Persea palustris, Magnolia virginiana, and others. Because surface water persists through the growing season in most years, the shrub layer is not well-developed. The herbaceous layer contains Panicum hemitomon, Woodwardia virginica, Bacopa caroliniana, Gratiola spp., Rhynchospora spp., and Triadenum walteri. Sphagnum cuspidatum is often abundant. These woodlands occur in seasonally flooded portions of natural flatwoods ponds of the southeastern Coastal Plain.
Comm #7737	Prosopis glandulosa / Bouteloua curtipendula Shrubland » more details accession code: VB.CC.19348.PROSOPISGLANDUL	Southeastern Ecology Working Gro...	0
Comm #7738	CEGL001991 » more details accession code: VB.CC.4544.CEGL001991 NOT CURRENTLY ACCEPTED	EcoArt 2002	0
Comm #7739	I.A.3.N.f » more details accession code: VB.CC.472.IA3NF	EcoArt 2002	0
Comm #7740	Tsuga caroliniana - (Tsuga canadensis) / Rhododendron maximum Forest » more details accession code: VB.CC.35045.CEGL007138	Southeastern Ecology Working Gro...	0	This association encompasses <i>Tsuga caroliniana</i> forests on valley bottoms, gorge slopes, or other protected landforms. <i>Tsuga canadensis</i> or <i>Pinus strobus</i> may share the canopy with <i>Tsuga caroliniana</i>. The shrub stratum is typically dense and dominated by <i>Rhododendron maximum</i>. <i>Galax urceolata</i> is a common understory component.