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Add/Drop	Name	Reference	Plots↓	Description
Comm #931	Salvia mellifera - Eriogonum cinereum Shrubland » more details accession code: VB.CC.37480.CEGL003728		20	This shrubland association occurs on somewhat steep to steep southwest-facing slopes at low elevations between 0 and 507 m. It is characterized by a dominance of <i>Salvia mellifera</i> and a subdominance of <i>Eriogonum cinereum</i> in the shrub layer. Herbs and trees are insignificant in this association.
Comm #932	Juglans californica / Heteromeles arbutifolia Woodland » more details accession code: VB.CC.37473.CEGL002854		20	This association is only known from the Santa Monica Mountains region. This woodland association occurs on somewhat steep to steep slopes with variable aspects (though often northeast-facing) at elevations between 237 and 514 m. It is dominated by <i>Juglans californica</i> in the tree layer and <i>Heteromeles arbutifolia</i> in the understory shrub layer. A variety of grass and forbs occur in the herbaceous layer.
Comm #933	TETRADYMIA SPINOSA SHRUBLAND ALLIANCE » more details accession code: VB.cc.30316.TETRADYMIASPINO	NVC 2004	20
Comm #934	Quercus wislizeni – Quercus douglasii / Herbaceous Association » more details accession code: urn:lsid:vegbank.org/vegbranch:commConcept:28634-{846F2962-E837-44A9-94D5-D952A876C43D} NOT CURRENTLY ACCEPTED	MCV2	20
Comm #935	Quercus kelloggii / Toxicodendron diversilobum / Grass Association » more details accession code: urn:lsid:vegbank.org/vegbranch:commConcept:28839-{BEE84C26-6551-4BCA-A378-7E9B4142E672} NOT CURRENTLY ACCEPTED	MCV2	20
Comm #936	Cornus sericea Rocky Mountain Wet Shrubland » more details accession code: urn:lsid:vegbank.org:commConcept:30074-{D1D8DC4F-7A55-4514-8C7E-98CD570C4DED}	NatureServe Biotics 2019	20	This riparian tall shrubland is widespread in the Columbia Basin, the Intermountain Basin, and in the Rocky Mountains, and is discontinuously scattered in sheltered areas of the Colorado Plateau. It often forms continuous, narrow bands along streambanks, benches and bars, as well as in slot canyons. Many stands are located on nearly level, frequently flooded banks, in burns in steep avalanche chutes, or otherwise experience periodic disturbance. It also can form very dense, small stands with limited disturbance, often at the base of a cliff. Soils are relatively deep, well-drained silty to sandy clay loams derived from alluvium, colluvium or glacial till. Elevations range from 715 to 2700 m (2300-8800 feet), with the lower elevations occurring at the northern end of the range in Montana, the higher elevations in Utah and Colorado. The tall (1-2 m) deciduous shrub canopy is dominated by <i>Cornus sericea</i>, generally accompanied by other tall shrubs, including <i>Prunus virginiana, Ribes aureum, Crataegus douglasii, Acer glabrum, Alnus incana, Salix bebbiana, Salix scouleriana, Cercocarpus ledifolius</i>, and <i>Juniperus scopulorum</i>. Short shrubs have sparse to moderate cover and include <i>Rosa woodsii, Symphoricarpos</i> spp., <i>Paxistima myrsinites, Mahonia repens, Arctostaphylos patula, Ribes cereum</i>, and the liana <i>Clematis ligusticifolia</i>. The understory is diverse and ranges from sparse to dense depending on how closed the tall-shrub layer is. Common forbs include <i>Thalictrum occidentale, Solidago canadensis, Aralia nudicaulis, Heracleum maximum, Heliomeris multiflora, Erythronium grandiflorum, Equisetum arvense, Maianthemum stellatum, Sanicula marilandica, Angelica arguta</i>, and <i>Symphyotrichum laeve</i>. Graminoids are generally less important but may include significant cover by <i>Elymus glaucus</i> or <i>Calamagrostis canadensis</i>. The majority of the herbaceous layer may consist of non-native species, including <i>Cirsium arvense, Dactylis glomerata, Agrostis stolonifera, Poa palustris, Phalaris arundinacea</i>, and <i>Phleum pratense</i>.
Comm #937	Quercus palustris - Quercus bicolor / Carex tribuloides - Carex radiata - (Carex squarrosa) Wet Forest » more details accession code: urn:lsid:vegbank.org:commConcept:35129-{3AB270F3-B156-4A7E-9245-4B89C0EAA786}	NatureServe Biotics 2019	20	This association occupies poorly drained backswamps, sloughs, low flats, and depressions in the floodplains of streams and small rivers in the Piedmont of Virginia and Maryland, and mountain valleys of Virginia and West Virginia. It is especially common in the broad, clay-rich floodplains of the northern Virginia Culpeper Basin. Shallow seasonal flooding and hummock-and-hollow microtopography are characteristic of most sites, with typical flooding depth of 20 to 25 cm in the hollows. Soils are typically heavy, white- or orange-mottled clay loams that are strongly acidic with moderately low calcium, high magnesium, and intermediate total base saturation levels. Vegetation is a closed forest with mixed overstory dominance by <i>Quercus palustris, Quercus bicolor, Acer rubrum, Nyssa sylvatica</i>, and <i>Fraxinus pennsylvanica</i>. <i>Ulmus americana, Acer rubrum</i>, and inconstantly <i>Acer negundo</i> are common understory trees. Climbing lianas of <i>Toxicodendron radicans, Parthenocissus quinquefolia, Smilax rotundifolia</i>, and <i>Vitis vulpina</i> are plentiful. The shrub layer is typically open to sparse but can include patches or scattered individuals of <i>Carpinus caroliniana, Viburnum prunifolium, Ilex verticillata, Viburnum dentatum, Cornus amomum, Sambucus nigra ssp. canadensis</i>, and <i>Lindera benzoin</i>. The herb layer is graminoid-rich with <i>Carex tribuloides, Carex squarrosa, Carex radiata, Cinna arundinacea</i>, and/or <i>Scirpus polyphyllus</i> forming dominance-patches. <i>Saururus cernuus</i> and <i>Carex typhina</i> also occasionally exhibit patch-dominance but are very inconstant in the type. Other characteristic herbs include <i>Arisaema triphyllum, Boehmeria cylindrica, Carex intumescens, Carex lupulina, Carex stipata var. stipata, Galium obtusum, Geum canadense, Glyceria striata, Impatiens capensis, Lycopus virginicus, Leersia virginica, Lysimachia ciliata, Polygonum punctatum, Ranunculus hispidus var. caricetorum, Scutellaria lateriflora, Symphyotrichum lateriflorum</i>, and <i>Symplocarpus foetidus</i>. <i>Lysimachia nummularia, Microstegium vimineum</i>, and <i>Polygonum cespitosum var. longisetum</i> can be problematic invasive exotics in this association.
Comm #938	Pinus rigida / Osmunda cinnamomea - Carex stricta - Eriophorum virginicum / Sphagnum spp. Swamp Woodland » more details accession code: urn:lsid:vegbank.org:commConcept:35372-{54FC7145-3C8B-46E9-BA3F-5F218EFEE1A9}	NatureServe Biotics 2019	20	This association occurs in saturated, acidic wetlands of valley floors and headwaters basins in the Ridge and Valley region of Virginia and West Virginia. Sites lie in an elevational range from about 600 to 950 m (2000-3100 feet), and are underlain by Devonian, Silurian, or Mississippian sandstones or acidic shales. Stands occur along the borders of large montane stream valleys and in headwater drainages, where abundant nutrient-poor groundwater is discharged from the base of adjacent slopes and peat has accumulated. Sites typically have complex microtopography, with numerous hummocks, hollows, and braided channels, and typically have high surface cover of sphagnum mosses. Peat deposits vary from superficial to deep (about 1 m), quaking mats that overlie large groundwater pores. Soils are usually poorly drained, organic or organic-rich sandy loams with very low base status. Vegetation physiognomy is variable, ranging from herbaceous with a sparse tree layer, to shrubland, to open savanna-like woodland, to nearly closed-canopy forest along upland edges. <i>Pinus rigida</i> is the typical overstory dominant (5-60% cover), but occasional trees of <i>Acer rubrum, Nyssa sylvatica</i>, and a few other species also occur. Shrub cover and density often vary greatly within sites, and shrubs often form a patch-mosaic with herb-dominated areas. <i>Alnus serrulata, Gaylussacia baccata, Hypericum densiflorum, Ilex verticillata, Kalmia latifolia, Lyonia ligustrina var. ligustrina, Menziesia pilosa, Photinia</i> spp., <i>Rhododendron maximum</i>, and <i>Spiraea tomentosa</i> are characteristic shrubs that occur in various aggregations. Except under dense shrubs, the herb layer is well-developed and dense, containing running vines of <i>Rubus hispidus</i>, high graminoid and fern cover, and moderate cover of forbs. Characteristic herbs, in rough decreasing order of constancy, include <i>Osmunda cinnamomea, Carex stricta, Gaultheria procumbens, Eriophorum virginicum, Carex atlantica ssp. atlantica, Drosera rotundifolia, Dulichium arundinaceum, Thelypteris noveboracensis, Parnassia asarifolia, Carex folliculata, Maianthemum canadense, Viola macloskeyi ssp. pallens, Glyceria canadensis, Glyceria laxa, Juncus brevicaudatus, Rhynchospora capitellata, Triadenum fraseri</i>, and <i>Calamagrostis coarctata</i>.
Comm #939	Carex striata var. brevis Marsh » more details accession code: urn:lsid:vegbank.org:commConcept:32964-{41F675C1-6FA6-4672-9DF1-7ECF142CA0E5}	NatureServe Biotics 2019	20	This vegetation occupies Coastal Plain depression meadows around the perimeter of Coastal Plain ponds and is dominated by <i>Carex striata var. brevis</i>. Examples include vegetation on the outer margins of Coastal Plain pond shores in New York, Maryland and Delaware or in localized swales in the New Jersey Pine Barrens. The nominal taxon ranges south to South Carolina, and the association could be found in the Coastal Plain of Virginia and the Carolinas. The substrate is typically composed of sand and gravel, but some community types may occur on organic muck. <i>Carex striata</i> usually occurs in dense stands with few other associates, which may include seedlings of <i>Cephalanthus occidentalis</i> and <i>Acer rubrum</i>, as well as <i>Cladium mariscoides, Rhexia virginica, Bidens frondosa, Rhynchospora macrostachya, Rhynchospora chalarocephala, Fimbristylis autumnalis, Juncus canadensis, Dulichium arundinaceum, Hypericum mutilum</i>, and <i>Panicum hemitomon</i>. <i>Sphagnum</i> is often abundant.
Comm #940	Populus angustifolia / Salix exigua Riparian Woodland » more details accession code: urn:lsid:vegbank.org:commConcept:29563-{6D4BD76E-1BF4-45D9-9331-0F0FE2CFC8C2}	NatureServe Biotics 2019	20	The type is widespread in mountainous regions of the San Juan, Pecos, and Rio Grande river basins in northern and central New Mexico and widely distributed throughout the Rocky Mountain region and Intermountain West. It is found in wide to narrow valleys at mid to upper elevations from 1670 to 2360 m (5480-7750 feet). It occurs on streamside alluvial bars that border perennial rivers and intermittent streams of low to moderate gradients (0.7-2.8%). In Colorado, this riparian woodland occupies point bars, gravel bars, benches and low areas that are flooded annually. It is a very common plant community of young seedling and sapling <i>Populus angustifolia</i> intermixed with <i>Salix exigua</i>. Sites are typically flooded every five years, sometime more often, and most are within the 25-year floodplain. Stream channel materials are usually coarse and composed of cobbles or gravel. Soils are young and weakly developed Entisols with wet (aquic) conditions within the top 50 cm or at least within rooting depth. They are well-drained sands and sandy loams mixed with gravels and cobbles. This type is characterized by middle-aged stands of <i>Populus angustifolia</i> in an open upper canopy, with a shrubby understory dominated by <i>Salix exigua</i>. <i>Populus angustifolia</i> saplings (derived from root sprouts) are common beneath the canopy. Other shrubs such as <i>Salix irrorata</i> may be well-represented but clearly subordinate to <i>Salix exigua</i>. The herbaceous layer is very diverse, with 98 species recorded for the type, 23 of which are native wetland indicators.