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Name
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Reference
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Plots↓
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Description |
Comm #1901
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A.1232
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accession code: VB.CC.999.A1232
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
7
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This alliance is common and widespread in the Great Plains, especially the northern portions, and parts of the intermountain western U.S. and possibly Canada. The communities in it range from dry or dry-mesic to wet-mesic. Mid grasses are the dominant vegetation in most communities, although short grasses and sedges can be codominant. The vegetation tends to be denser where the mid grasses are predominant and more open where shorter graminoids are abundant. The mid grasses grow to 0.5-1.0 m on favorable sites, while the short grasses and sedges are less than 0.5 m tall. The most abundant midgrass is ~Pascopyrum smithii$. Common associates include ~Hesperostipa comata (= Stipa comata), Nassella viridula, Koeleria macrantha, Schizachyrium scoparium, Hesperostipa spartea (= Stipa spartea)$, and ~Poa$ spp. In the drier communities of this alliance ~Bouteloua gracilis$ is the most common shortgrass. Other short graminoids typically found in the drier communities include ~Carex inops ssp. heliophila, Carex duriuscula (= Carex eleocharis), Carex filifolia$, and ~Bouteloua curtipendula$ (in the northern portion of this alliance's range), ~Aristida purpurea$, and ~Buchloe dactyloides$ (in the southern half of this alliance's range). In the wetter communities within this alliance, ~Distichlis spicata, Hordeum jubatum, Elymus trachycaulus$, and ~Iva annua$ are common. Forbs and shrubs are generally minor components of communities within this alliance. If shrubs are present they are rarely taller than 1 m. Some forbs that are usually scattered about are ~Gaura coccinea, Sphaeralcea coccinea, Amorpha canescens, Astragalus$ spp., and ~Tragopogon dubius$. Shrubs include ~Symphoricarpos occidentalis, Artemisia cana, Artemisia frigida$, and ~Opuntia$ spp. ^Communities within this alliance occur on several different soil types. The soil is most often clay or clay loam, however. it can be loam or sandy loam. In the east and central part of this alliance's range, these communities can be found on flat or rolling uplands, hillslopes, or along streams or depressions. In the western part of this alliance's range, its communities are found where local conditions are wetter than the average. This includes such areas as the base of slopes or along rivers or streams. |
Comm #1902
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Quercus kelloggii Alliance
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accession code: urn:lsid:vegbank.org/vegbranch:commConcept:28619-{55E48B28-FD0C-41A6-AC19-B87C5265144B}
NOT CURRENTLY ACCEPTED
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MCV2 |
7
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Comm #1903
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Ambrosia deltoidea Shrubland Alliance
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accession code: VB.cc.30605.AMBROSIADELTOID
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NVC 2004 |
7
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Comm #1904
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Picea rubens / Carex trisperma / Sphagnum spp. - Polytrichum spp. Forest
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accession code: VB.CC.37505.CEGL006590
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7
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This acidic conifer woodland swamp occurs on saturated and temporarily flooded organic soils in headwater basins of the Allegheny Mountains region of West Virginia, at elevations between 1000 and 1430 m. It is a small-patch community that occupies flat to very gently sloping land (0- to 2-degree slopes) along the margins of open peatlands, forming narrow "spits," fingers, or islands. It also occurs in peaty depressions within high plateau spruce forests. Microtopography is characterized by a mix of rounded peat hummocks and irregular moss-covered hummocks formed over tree roots, woody stem clusters, tip-up mounds, nurse logs, and decaying wood. Bedrock is typically sandstone or occasionally shale, and may be encountered at less than 20 cm depth. Soils are poorly drained muck, peat, or organic-rich silt/clay loam. Depth of organic soil varies greatly from 5-120 cm. Soil pH averages 3.5. The community is characterized by an open canopy of <i>Picea rubens</i> and fairly sparse shrub layer growing on irregular hummocks, with swales and hollows occupied by <i>Carex trisperma var. trisperma</i> and peat-forming bryophytes. Additional canopy species that occur occasionally include <i>Pinus strobus, Acer rubrum, Amelanchier laevis, Pinus rigida, Sorbus americana</i>, and <i>Betula alleghaniensis var. alleghaniensis</i>. The tall-shrub layer is also dominated by <i>Picea rubens</i> with occasional low cover by <i>Viburnum nudum var. cassinoides, Nemopanthus mucronatus</i>, and <i>Photinia melanocarpa</i>. The short-shrub layer includes <i>Picea rubens, Vaccinium myrtilloides</i>, and <i>Vaccinium angustifolium</i>. The herbaceous layer is dominated by <i>Carex trisperma var. trisperma</i> and may include low cover by <i>Rubus hispidus, Osmunda cinnamomea var. cinnamomea, Gaultheria hispidula, Vaccinium oxycoccos</i>, and <i>Carex debilis</i>. Nonvascular plants are dominated by <i>Sphagnum</i> spp. with lesser amounts of <i>Polytrichum</i> spp., <i>Hypnum imponens</i>, and <i>Leucobryum glaucum</i>. Mean species richness of all vascular plants and any nonvascular plants with cover >1% is 31 taxa per 400 square meters, with about 20% of the diversity occurring in the bryophyte layer. |
Comm #1905
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Carex scabrata - Viola cucullata / Plagiomnium ciliare Herbaceous Vegetation
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accession code: VB.CC.37498.CEGL006597
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7
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°This linear, sloping forested seep occurs on saturated, temporarily flooded, and semipermanently flooded soils in headwater basins of the Allegheny Mountains region of West Virginia, at elevations between 780 and 1300 m. It occupies gently to steeply sloping drainages (1.5-20°) in upland forest, typically occurring as small, discontinuous patches that repeat across a mountainside. It is fed primarily by seepage and springs from the adjacent upland forest. Microtopography is characterized by a complex of tip-up mounds, buttressed roots, and downed wood over large and small rocks. Bedrock is typically shale or sometimes sandstone. Soils are moderately to poorly drained and stony, with variable texture ranging from muck to silt loam to sandy loam. The canopy is open and dominated by <i>Betula alleghaniensis var. alleghaniensis</i> with an herbaceous layer dominated by <i>Carex scabrata, Viola cucullata</i>, and the characteristic bryophyte <i>Plagiomnium ciliare</i>. The canopy often includes low cover by <i>Acer saccharum var. saccharum, Picea rubens</i>, and <i>Fagus grandifolia</i>. Most trees are not rooted in the seep, but rather overhang and shade the seep from the edges. The subcanopy and shrub layers are sparse. The herbaceous layer is dominated by <i>Carex scabrata, Viola cucullata, Laportea canadensis, Tiarella cordifolia</i>, and <i>Glyceria melicaria</i>. Other herbaceous species with high constancy include <i>Dryopteris intermedia, Saxifraga micranthidifolia, Cardamine diphylla, Chrysosplenium americanum, Poa alsodes, Symphyotrichum prenanthoides, Packera aurea, Thelypteris noveboracensis, Cardamine pensylvanica, Arisaema triphyllum, Monarda didyma</i>, and <i>Oxalis montana</i>. Nonvascular plants are dominated by <i>Plagiomnium ciliare</i> with lesser amounts of <i>Brachythecium rivulare, Thuidium delicatulum</i>, and <i>Rhizomnium appalachianum</i>. The indicator species that help to distinguish this community from others within the forested seep physiognomy in West Virginia are <i>Carex scabrata, Laportea canadensis, Tiarella cordifolia, Acer saccharum var. saccharum, Brachythecium rivulare, Cardamine diphylla, Carex leptonervia</i>, and <i>Plagiomnium ciliare</i>. Mean species richness of all vascular plants and any nonvascular plants with cover >1% is 32 taxa per 400 square meters, with about 15% of the diversity in the bryophyte layer. |
Comm #1906
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ARTEMISIA FRIGIDA DWARF-SHRUBLAND ALLIANCE
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accession code: VB.cc.29849.ARTEMISIAFRIGID
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NVC 2004 |
7
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Comm #1907
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Quercus agrifolia - Salix lasiolepis Woodland
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accession code: VB.CC.37435.CEGL002868
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7
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This association is only known from the Santa Monica Mountains region. This woodland association occurs on gentle to somewhat steep slopes with variable aspects at low elevations between 119 and 527 m. It is dominated by <i>Quercus agrifolia</i> in the tree layer and <i>Salix lasiolepis</i> in the understory tree layer. A variety of grasses and forbs are often abundant in the herbaceous layer. |
Comm #1908
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Populus deltoides ssp. wislizeni Temporarily Flooded Forest Alliance
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accession code: VB.cc.30787.POPULUSDELTOIDE
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NVC 2004 |
7
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Comm #1909
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Distichlis spicata - Ambrosia chamissonis Herbaceous Vegetation
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accession code: VB.CC.37476.CEGL002882
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7
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This association is only sampled from the Santa Monica Mountains region. Anecdotal observation suggests it may occur northward at least to Marin County in northwestern California, where brackish or saline lagoons and other bodies of water exist adjacent to sand flats or dunes. This herbaceous association occurs on flat to somewhat steep, often northeast slopes at low elevations between 0 and 15 m. It is dominated by <i>Distichlis spicata</i> in the herbaceous layer, and <i>Ambrosia chamissonis</i> is characteristically present as a subdominant. <i>Atriplex lentiformis, Atriplex watsonii</i>, and <i>Suaeda californica</i> are sometimes found in the shrub layer at low cover. |
Comm #1910
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Acidic Cove Forest
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accession code: VB.CC.29312.ACIDICCOVEFORES
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2004 VA Natural Heritage Communities Report |
7
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