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Add/Drop	Name	Reference	Plots↓	Description
Comm #5781	Ledum glandulosum / Carex obnupta / Sphagnum spp. Shrubland » more details accession code: VB.CC.33445.CEGL003434	Western Ecology Working Group of...	0	Distinguished from similar associations farther north by the dominance of <i>Ledum glandulosum</i> instead of <i>Ledum groenlandicum</i>, this vegetation occurs only between the Columbia River and northern California. This early-seral association occurs in open mire complexes in poorly drained basins, valleys, and on floating lake mats. Circular or elliptical hummocks 1-3 feet taller than the surrounding mire surface form islands of ombrotrophic vegetation in otherwise minerotrophic mire fed by springs, runoff, or lakewater. Mature trees are absent, but reproducing <i>Thuja plicata</i> and <i>Pinus contorta var. contorta</i> occur in about half the plots and are slow-growing and stunted, most dying before maturity. The shrub layer is dominated by <i>Ledum glandulosum</i> with up to 60% cover. <i>Kalmia microphylla</i> or <i>Vaccinium uliginosum</i> are occasional. Two distinct variants occur with either <i>Sphagnum palustre</i> or <i>Sphagnum fuscum</i> dominant in the moss layer. The herb layer in the <i>Sphagnum palustre</i> variant typically contains 15-25 species and is characterized by <i>Vaccinium oxycoccos, Drosera rotundifolia, Lysichiton americanus, Eriophorum chamissonis, Trientalis europaea ssp. arctica, Carex echinata ssp. phyllomanica</i>, and <i>Carex leptalea</i>. The herb layer in the <i>Sphagnum fuscum</i> variant is conspicuously dwarfed and species-poor (10 or fewer) because of high acidity and low nutrient status. Hollows between hummocks in both variants are generally wet, species-poor, and consist almost entirely of lawns of <i>Sphagnum angustifolium, Sphagnum pacificum</i>, or bare muddy bottoms if trailed by elk and deer.
Comm #5782	Alaskan Pacific Maritime Alpine Dwarf-Shrubland » more details accession code: urn:lsid:ecoobs.vegbank.org:commConcept:9008-{CAC2E2BB-E3CD-457E-9E13-A5DA24139C97}	Western Ecology Working Group of...	0
Comm #5783	Aleutian Volcanic Rock and Talus » more details accession code: urn:lsid:ecoobs.vegbank.org:commConcept:9007-{FC2B9712-34F8-4C1B-9593-FA6233006221}	Western Ecology Working Group of...	0
Comm #5784	I.A.6.N.a » more details accession code: VB.CC.407.IA6NA	EcoArt 2002	0
Comm #5785	Quercus laurifolia - Quercus lyrata / Carpinus caroliniana - Persea palustris / Vaccinium elliottii Forest » more details accession code: VB.CC.35195.CEGL004737	Southeastern Ecology Working Gro...	0	This community type covers forests of low blackwater bottomland river terraces and ridges, in the Atlantic Coastal Plain of the Carolinas. This type may have a somewhat longer hydroperiod than other types in this or other temporarily flooded alliances, but it is not seasonally flooded. It is distinguished from some related types by lacking a significant component of levee species. The canopy is dominated by <i>Quercus laurifolia</i> and <i>Quercus lyrata</i>. The subcanopy characteristically contains <i>Carpinus caroliniana</i> and <i>Persea palustris</i>. One prominent shrub is <i>Vaccinium elliottii</i>. Additional floristic information is needed. Stands of this community have a significant component of <i>Quercus lyrata</i> and generally lack a significant component of <i>Pinus taeda</i>.
Comm #5786	Glyceria borealis Semipermanently Flooded Herbaceous Alliance » more details accession code: VB.CC.17767.GLYCERIABOREALI	Western Ecology Working Group of...	0	The vegetation in this alliance occurs in wetlands along pond and lake margins and low-gradient streams in the northwestern United States. Stands are located between 670-1810 m elevation. Stands are found on level sites in standing water. Water is present above the soil surface throughout the summer. Soils are poorly to very poorly drained and vary from mineral to organic. Mineral soils usually have a thick layer of organic matter in the upper horizon. Species diversity is low due to the wet conditions. Glyceria borealis generally forms monotypic stands with 30-90% cover. Other graminoids that may be present include Eleocharis acicularis, Eleocharis palustris, and Glyceria striata (= Glyceria elata). Ranunculus aquatilis and Sparganium angustifolium are occasional forb associates.
Comm #5787	Spartina pectinata - Carex spp. - Calamagrostis canadensis Sand Wet Meadow » more details accession code: urn:lsid:vegbank.org:commConcept:33942-{29E10168-8054-4BA7-984D-3CF789C507A0}	NatureServe Biotics 2019	0	This wet sand prairie is found in the central and upper midwestern region of the United States and possibly parts of adjacent Canada. Sites occur on the sandy soils of outwash plains, lake plains, and valley trains that are flooded for a short time during the growing season. The dominant vegetation of the community consists of dense graminoids 1-2 m tall. <i>Calamagrostis canadensis, Carex</i> spp., and <i>Spartina pectinata</i> are dominant. Other common species include <i>Arnoglossum plantagineum, Eupatorium perfoliatum, Iris virginica, Lythrum alatum</i>, and <i>Sium suave</i>.
Comm #5788	Xerophyllum tenax - Sanguisorba officinalis Herbaceous Vegetation » more details accession code: VB.CC.32598.CEGL003439	Western Ecology Working Group of...	0	This association occurs on acidic mineral soil around the margins of seasonally wet meadows in the northern Coast Range of Oregon. The association is characterized by hummocks of <i>Xerophyllum tenax</i> interspersed with pockets of <i>Sanguisorba officinalis</i>, throughout which are distributed tightly packed mats and hummocks of <i>Sphagnum capillifolium</i> and <i>Sphagnum mendocinum</i>. The hummocks of <i>Sphagnum capillifolium</i> are in part elevated above groundwater influence, lowering the nutrient status of this association. <i>Vaccinium caespitosum, Pteridium aquilinum</i>, and <i>Carex obnupta</i> are occasional to frequent associates. The juxtaposition of the typically upland <i>Xerophyllum</i> with typically wetland <i>Sanguisorba</i> and <i>Sphagnum</i> suggests that this association occurs in a long-term hydrologic tension zone between upland and wetland. Long-term variation in water levels can be caused by beavers, humans, climatic variability, or combinations of these variables.
Comm #5789	Ledum glandulosum / Darlingtonia californica / Sphagnum spp. Shrubland » more details accession code: VB.CC.33444.CEGL003435	Western Ecology Working Group of...	0	This early-seral association occurs in open mire complexes on floating lake mats and on sandy soils with perched water tables. It is restricted to the central and southern coast of Oregon. Circular or elliptical hummocks 1-3 feet taller than the surrounding mire surface form islands of ombrotrophic vegetation in otherwise minerotrophic mire fed by springs, runoff, or lakewater. Vegetation is similar to ~<i>Ledum glandulosum / Carex obnupta / Sphagnum</i> spp. Shrubland (CEGL003434)$$, but <i>Darlingtonia californica</i> dominates the herb layer with up to 20% cover, and <i>Carex obnupta</i> is absent. Mature trees are scarce, and reproducing <i>Pinus contorta var. contorta, Tsuga heterophylla, Thuja plicata</i>, and <i>Picea sitchensis</i> are scarce or absent. These trees are slow-growing and stunted, and most die before maturity. The shrub layer is dominated by <i>Ledum glandulosum</i> with 10-60% cover. <i>Vaccinium oxycoccos</i> and <i>Vaccinium uliginosum</i> may be codominant, with up to 40 and 70% cover, respectively. Lesser amounts of <i>Spiraea douglasii</i> and <i>Lonicera involucrata</i> are also present. Two distinct variants occur with either <i>Sphagnum palustre</i> or <i>Sphagnum fuscum</i> dominant in the moss layer. The herb layer in the <i>Sphagnum palustre</i> variant is moderately diverse (up to 16 species), including more hydrophytic species such as <i>Comarum palustre, Carex aquatilis var. dives</i>, and <i>Carex cusickii</i>. The herb layer in the <i>Sphagnum fuscum</i> variant is depauperate and includes only 8 species, has fewer hydrophytic species, and the vegetation is conspicuously dwarfed. These conditions are caused by high acidity and low nutrient status engendered by <i>Sphagnum fuscum</i>. This variant does not form until the underlying peat mat is dense, firm, and sufficiently raised above the groundwater. Hollows between hummocks in both variants are generally wet, species-poor, and consist almost entirely of lawns of <i>Sphagnum angustifolium, Sphagnum pacificum</i>, or bare muddy bottoms if trailed by elk and deer.
Comm #5790	Populus tremuloides / Carex aquatilis var. aquatilis Forest » more details accession code: VB.CC.32737.CEGL003442	Western Ecology Working Group of...	0	This is a local wetland forest reported only from northeastern Oregon. It is known from moist, flat basins at moderate elevations in the mountains. Stands have seasonally wet, fine-textured mineral soils with evident mottling in a layer 29 inches below the soil surface. <i>Populus tremuloides</i> is the dominant tree. <i>Picea engelmannii</i> can be a codominant. <i>Pinus contorta</i> may be present with low cover. The understory, which has no shrubs, is dominated by graminoids, with <i>Carex aquatilis var. aquatilis</i> and <i>Calamagrostis canadensis</i> codominant, and <i>Deschampsia caespitosa, Elymus glaucus, Glyceria striata (= Glyceria elata), Carex jonesii, Carex deweyana</i>, and <i>Juncus nevadensis</i> present. Exotics include <i>Phleum pratense</i> and <i>Poa pratensis</i>. Forbs present include <i>Veratrum viride, Pedicularis groenlandica, Symphyotrichum foliaceum (= Aster foliaceus), Canadanthus modestus (= Aster modestus), Senecio serra</i>, and <i>Geum macrophyllum</i>.