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Add/Drop	Name	Reference	Plots↓	Description
Comm #311	Baccharis salicifolia Association » more details accession code: urn:lsid:vegtwig.vegbank.org:commconcept:411-{4FD49A42-68D2-4FF1-AE6B-836FA4277745}	MCV2	58	63.510.01
Comm #312	Thuja plicata - Tsuga heterophylla / Vaccinium ovatum - Gaultheria shallon Forest [Proposed] » more details accession code: urn:lsid:ecoobs.vegbank.org:commConcept:51-{18ADFAE8-425E-4F41-8632-BD1725CDF765}	Ramm-Granberg 2020	58	NVC Code CEGL008282
Comm #313	THUJA PLICATA ALLIANCE » more details accession code: VB.CC.8484.THUJAPLICATAALL	Jennings 2003. Vegetation alliances: composition and function.	57
Comm #314	Salix planifolia / Carex aquatilis Wet Shrubland » more details accession code: urn:lsid:vegbank.org:commConcept:30136-{36222003-B1EC-4CB0-A479-129CAF14DCD7}	NatureServe Biotics 2019	57	This wetland/riparian low shrubland association typically occurs in the upper montane and subalpine zones in the Rocky Mountains from New Mexico to Montana, and west into Utah and Idaho. Elevation ranges from 2700-3700 m (8300-11,700 feet) in Colorado to 1750-2690 m (5740-8830 feet) in Montana. Stands typically occurs in wide, glaciated valleys bottoms adjacent to streams, around lakes, fens and seeps, and in depressions where snowmelt runoff saturates soils during the growing season. Sites may be flat or uneven with raised hummocks to moderately sloping. The water table at these sites is usually near the surface throughout the growing season. Soils are typically poorly drained and have an organic peat top layer over mineral soils with variable textures. Mottling is often evident. The vegetation is characterized by a low (&lt;1.5 m), typically closed shrub layer (ranging from 30-100% cover) that is dominated by <i>Salix planifolia</i>, with an herbaceous layer dominated by the wet sedge <i>Carex aquatilis</i>. Other common willow species that may be present at lower elevations are <i>Salix geyeriana</i> or <i>Salix monticola</i> and at higher elevations <i>Salix brachycarpa, Salix glauca</i>, and <i>Salix wolfii</i>. Other shrubs that may be present in lower concentrations include <i>Betula glandulosa</i> and <i>Dasiphora fruticosa ssp. floribunda</i>. The moderately dense to dense herbaceous layer is dominated by wet graminoids but often has a diverse forb layer. Other than the dominant wet sedge <i>Carex aquatilis, Calamagrostis canadensis, Carex utriculata</i>, and <i>Deschampsia cespitosa</i> are often present in the graminoid layer. Associated wet and mesic forb species are <i>Aconitum columbianum, Caltha leptosepala, Cardamine cordifolia, Conioselinum scopulorum, Erigeron peregrinus, Ligusticum tenuifolium, Mertensia ciliata, Pedicularis groenlandica, Polygonum bistortoides, Rhodiola rhodantha, Saxifraga odontoloma, Senecio triangularis, Swertia perennis</i>, and <i>Veronica wormskjoldii</i>.
Comm #315	Alnus serrulata / Calamagrostis canadensis Shrub Swamp » more details accession code: urn:lsid:vegbank.org:commConcept:33847-{63CC487F-EA2C-4103-8AA9-265D8DAB6358}	NatureServe Biotics 2019	57	This alder swamp is found widely throughout the northeastern United States south of near-boreal regions. These shrublands are found on muck overlying mineral soils (peat deposits are not typical) of upland marsh borders, at the edges of red maple swamps, or in acidic colluvium at bases of slopes. The pH of these systems is broadly circumneutral to somewhat calcareous. The vegetation is dominated by tall shrubs, characterized and usually dominated by <i>Alnus serrulata</i>, sometimes in a mixture with (or rarely replaced by) <i>Alnus incana</i>. Associate shrubs vary somewhat with geography and include <i>Cornus sericea, Rosa palustris, Physocarpus opulifolius, Viburnum dentatum</i>, and <i>Salix</i> spp. Saplings of <i>Acer rubrum</i> are typical. Short shrubs include <i>Spiraea alba var. latifolia</i> and <i>Lindera benzoin</i>. Less frequent shrubs include <i>Cephalanthus occidentalis, Decodon verticillatus, Ilex verticillata, Rhododendron viscosum</i>, and <i>Sambucus nigra ssp. canadensis</i>. Herbaceous associates include <i>Calamagrostis canadensis, Osmunda regalis, Glyceria striata, Thelypteris palustris, Galium</i> spp., <i>Typha latifolia, Polygonum hydropiper, Bidens cernua, Galium tinctorium, Cicuta maculata, Peltandra virginica</i>, and <i>Carex stricta</i>.
Comm #316	Quercus alba - Quercus montana - Carya glabra / Cornus florida / Vaccinium pallidum Forest » more details accession code: urn:lsid:vegbank.org:commConcept:36575-{A482096F-0252-47C7-B2C3-F8A9B2854ADD}	NatureServe Biotics 2019	57	This community is associated with substrates weathered from shale, sandstone, and other sedimentary and metasedimentary rocks in the Central Appalachian region. It appears to be widespread at low elevations of the Ridge and Valley province in Virginia and more local on the western flank of the Northern Blue Ridge, the northern edge of the Southern Blue Ridge, and extending into the Ridge and Valley of West Virginia and Maryland. It is rare on monadnocks of the extreme western Piedmont in southwestern Virginia. Extensive sites for this community in the Ridge and Valley occur on low shale knobs and ridges, or at the base of higher sandstone ridges, where local shale strata have been exposed by stream incision. On the Blue Ridge, stands are confined to a belt of metasedimentary rocks that overlie the plutonic basement complex on the western side of the anticlinorium. Habitats encompass dry, mostly southeast- to west-facing slopes, hollows, broad sub-level ridge crests, and occasionally dry valley bottoms at low elevations (mostly &lt;610 m [2000 feet]). Slope shape is generally convex in at least one direction. The characteristic vegetation of this type is an open oak-hickory or oak-hickory-pine forest dominated by oaks (particularly <i>Quercus montana</i> and <i>Quercus alba</i>), with high cover of <i>Carya</i> spp., especially <i>Carya glabra</i>. <i>Quercus velutina, Quercus rubra, Carya tomentosa, Pinus virginiana</i>, and <i>Pinus strobus</i> are also important, sometimes codominant trees. Stands in which <i>Quercus alba</i> greatly dominates are also common. Total canopy cover is usually in the range of 60-80%, and dominant canopy trees typically do not much exceed, and in some situations do not reach, 20 m in height. Minor canopy associates include <i>Carya ovalis, Pinus echinata, Quercus coccinea</i>, and <i>Quercus stellata</i>. Young representatives of most canopy species are common in the understory, along with <i>Cornus florida</i> and <i>Amelanchier arborea</i>. Generally, there is only a moderate to sparse representation of ericaceous (heath family) shrubs in this community type. However, on gentle ridge crests, where litter and humus tend to accumulate, <i>Vaccinium pallidum</i> may dominate the shrub layer in low colonies. On the more extensive steep, convex slopes, where litter accumulations are thin and patchy, ericads are sparse and herbaceous richness tends to be moderately high, although total herb cover can be quite sparse.
Comm #317	Quercus agrifolia / Annual Grass-Herb Woodland » more details accession code: VB.CC.37413.CEGL002861		56	This association is known from much of central and southern coastal California, from Solano to San Diego counties. This woodland association occurs on flat to steep slopes that are often facing northwest at low elevations between 45 and 700 m. It is dominated by <i>Quercus agrifolia</i> in the tree layer and <i>Bromus diandrus</i> and other herbs in the herbaceous layer.
Comm #318	Pinus serotina / Lyonia lucida - Ilex glabra - (Cyrilla racemiflora) Wet Shrubland » more details accession code: urn:lsid:vegbank.org:commConcept:32706-{62E1A323-319F-4F7A-8C16-29D9303653F9}	NatureServe Biotics 2019	56	This is the typical high pocosin or tall pocosin of peatlands and wet mineral soils of the southeastern Coastal Plain, ranging from North Carolina south to Georgia and apparently to Florida. <i>Pinus serotina</i> individuals are scattered and more-or-less stunted. Typical shrubs, forming a dense tangle with abundant <i>Smilax laurifolia</i>, are <i>Cyrilla racemiflora, Lyonia lucida, Ilex glabra, Ilex coriacea, Persea palustris</i>, and sometimes <i>Kalmia carolina</i>. Other component shrubs can rarely include <i>Clethra alnifolia, Vaccinium formosum, Gaylussacia frondosa, Kalmia cuneata, Aronia arbutifolia, Chamaecyparis thyoides, Acer rubrum var. trilobum, Morella cerifera, Lyonia ligustrina var. foliosiflora, Magnolia virginiana, Rhododendron viscosum</i>, and <i>Toxicodendron radicans</i>. Of these species, <i>Magnolia virginiana</i> may be constant, all others are quite scarce, except <i>Kalmia cuneata</i> locally.
Comm #319	Taxodium distichum - Fraxinus pennsylvanica - Quercus laurifolia / Acer rubrum / Saururus cernuus Floodplain Forest » more details accession code: urn:lsid:vegbank.org:commConcept:35908-{D36E73CE-BDD5-4382-A63B-C3386CBAA67A}	NatureServe Biotics 2019	56	This forest of bald-cypress and mixed hardwoods occurs in sloughs, alluvial flats, and other alluvial settings in the Coastal Plain of the southeastern United States, especially on soils with a percentage of silt. This type was originally documented in the Atlantic Coastal Plain but also occurs in the Gulf Coastal Plain as well. Examples of this association are dominated by <i>Taxodium distichum</i>, but differ from most other bald-cypress forests in the diversity of other hardwoods present (stands codominated by <i>Nyssa</i> are accommodated by other associations). A number of other tree species may be present in the canopy and/or subcanopy, some of which are indicative of less inundated conditions typically found in well developed slough and backswamps. These species include <i>Fraxinus pennsylvanica, Quercus laurifolia, Quercus lyrata, Quercus michauxii, Acer rubrum, Liquidambar styraciflua, Planera aquatica, Fraxinus caroliniana, Celtis laevigata, Ulmus americana, Platanus occidentalis</i>, and <i>Acer negundo</i>. The canopy is closed and the subcanopy layer generally is well-developed. The shrub layer is sparse and the herbaceous layer ranges from sparse to moderately dense depending upon duration of flooding. <i>Acer rubrum</i> is the strong dominant in the subcanopy with <i>Planera aquatica, Carpinus caroliniana, Ulmus alata, Ilex decidua</i>, and <i>Celtis laevigata</i> typical in this stratum as well. <i>Itea virginica</i> and <i>Cephalanthus occidentalis</i> are typical in the shrub layer. A variety of vines are possible within occurrences of this community. These include <i>Vitis rotundifolia, Vitis aestivalis, Bignonia capreolata, Campsis radicans, Berchemia scandens, Trachelospermum difforme</i>, and <i>Mikania scandens</i>. The most commonly occurring herbs are <i>Asclepias perennis, Boehmeria cylindrica, Pilea pumila, Saururus cernuus, Commelina virginica, Justicia ovata, Phanopyrum gymnocarpon, Carex lupulina, Leersia lenticularis, Ludwigia alternifolia</i>, and <i>Chasmanthium latifolium</i>. This forest type is documented in North Carolina and South Carolina; global distribution needs assessment.
Comm #320	Quercus rubra - Fraxinus americana - Acer saccharum / Actaea racemosa - Caulophyllum thalictroides Forest » more details accession code: urn:lsid:vegbank.org:commConcept:33090-{04A8959E-5109-4FAC-8B27-257B57BE8A1D}	NatureServe Biotics 2019	56	This is a rich, high-elevation red oak forest that occurs on amphibolite or other mafic rock in the Southern Blue Ridge of North Carolina and possibly adjacent Tennessee. <i>Quercus rubra</i> is constant and dominant but sometimes only weakly so. <i>Fraxinus americana</i> and <i>Acer saccharum</i> are generally abundant and have high constancy. <i>Carya</i> species are generally abundant. <i>Quercus alba, Quercus montana</i>, and <i>Prunus serotina</i> are fairly frequent and sometimes abundant. Other mesophytic trees such as <i>Betula lenta, Betula alleghaniensis, Tilia americana var. heterophylla</i>, and <i>Aesculus flava</i> are sometimes present.