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Add/Drop	Name	Reference	Plots↓	Description
Comm #5381	Quercus laurifolia - (Quercus nigra, Nyssa biflora) / Diospyros virginiana Forest » more details accession code: VB.CC.27590.QUERCUSLAURIFOL	Southeastern Ecology Working Gro...	0	This West Gulf Coastal Plain community occurs as isolated circular depressions of less than an acre to several acres in size, locally called "baygols." The closed canopy is typically dominated by Quercus laurifolia, with lesser amounts of Quercus nigra and Nyssa biflora. The typical understory contains Diospyros virginiana and Crataegus spp. The herb stratum is poorly developed. This community occurs on the Intermediate Pleistocene Terraces (Bentley and Montgomery) in a pine flatwoods landscape.
Comm #5382	Nolina bigelovii Shrubland » more details accession code: VB.CC.31826.CEGL003064	Western Ecology Working Group of...	0	This shrubland forms local, scattered stands in the mountains and deserts of southern California and the Mojave and Lower Sonoran deserts. Stands likely also occur in Arizona and Nevada. Elevations range from 250-2250 m, and sites typically occur on steep slopes with abundant rock outcrop. Substrates are rocky, poorly developed soils derived from granitic rocks or are of calcareous origin. Rocky substrates allow water to run off rock faces and concentrate in the crevices. This shrubland is characterized by the subshrub <i>Nolina bigelovii</i>, forming an open, emergent canopy over a low (&lt;1 m tall) shrub layer that is composed of succulents and microphyllous evergreen and deciduous species. Common species may include <i>Ferocactus cylindraceus, Coleogyne ramosissima, Encelia farinosa, Eriogonum fasciculatum, Acacia greggii, Agave deserti, Hyptis emoryi, Ericameria linearifolia, Simmondsia chinensis</i>, and <i>Ambrosia dumosa</i>. Emergent individuals of <i>Juniperus californica</i> or <i>Fouquieria splendens</i> up to 5 m in height, may also be present. The herbaceous layer is typically sparse and composed primarily of perennials, both forbs and grasses.
Comm #5383	A.1377 » more details accession code: VB.CC.1151.A1377 NOT CURRENTLY ACCEPTED	EcoArt 2002	0	This is a brackish, non-tidal, seasonally flooded alliance including the wettest parts of non-tidal ponds with brackish water from hurricane flooding, storm tides, or island overwash. It includes zonal vegetation dominated by ~Leptochloa fusca ssp. fascicularis (= Leptochloa fascicularis var. maritima)$. Other characteristic species include ~Bacopa monnieri, Pluchea odorata var. odorata$, and ~Eleocharis parvula$.
Comm #5384	Quercus lyrata - Quercus (palustris, phellos) - Liquidambar styraciflua - (Populus heterophylla) Forest » more details accession code: VB.CC.22646.QUERCUSLYRATAQU	Southeastern Ecology Working Gro...	0	This upland swamp association is found in the Highland Rim (Pennyroyal Karst Plain) of Tennessee and Kentucky. In addition to the nominal species, the canopy also contains Fraxinus pennsylvanica, Acer rubrum, Populus deltoides, Diospyros virginiana, and Nyssa biflora. Cephalanthus occidentalis, Itea virginica, Campsis radicans, Vitis rotundifolia, Bidens spp., and Saururus cernuus are found in the understory. Populus heterophylla may be more prevalent in the understory than in the canopy. In some examples, Quercus lyrata may dominate a wetter portion of a pond, with Quercus palustris and/or Quercus phellos present on the drier margins.
Comm #5385	Opuntia littoralis Shrubland » more details accession code: VB.CC.31825.CEGL003066	Western Ecology Working Group of...	0	This vegetation type occurs along the southern coastal region of California and on the Channel Islands off the southern coast. Climate and soil-moisture availability are the determining factors in the distribution of <i>Opuntia littoralis</i> shrublands. Overall, the southern coastal regions have low average annual precipitation, typically less than 30 cm annually. A very high percentage of this precipitation falls during the fall and winter months as rain, while summers are typically hot and dry. Winter temperatures are mild. This vegetation type is found on xeric, somewhat steep foothill slopes, usually on southerly aspects, from sea level to over 1000 m elevation. Soils are derived from colluvium, poorly developed, thin and rocky, with low moisture-holding capacity and loamy textures. This coastal scrub vegetation type is distinguished by the conspicuous presence, and occasional dominance, of stem-succulent cacti species, particularly <i>Opuntia littoralis, Opuntia oricola, Opuntia prolifera</i>, and <i>Opuntia californica var. parkeri (= Opuntia parryi)</i>. Several other shrub species are commonly present, most of them summer-dormant leaf succulents. Species can include <i>Artemisia californica, Encelia californica, Cneoridium dumosum, Eriogonum fasciculatum, Euphorbia misera, Cleome isomeris (= Isomeris arborea), Lycium</i> spp., <i>Mirabilis californica</i>, and <i>Salvia mellifera</i>. The shrub layer is typically less than 2 m in height and has a continuous to intermittent canopy cover. Emergent individuals of the taller, broad-leaved shrubs <i>Rhus integrifolia</i> and/or <i>Sambucus mexicana</i> can be present. The herbaceous layer is variable in species composition and abundance, but perennial succulents of the genus <i>Dudleya</i> are usually present.
Comm #5386	Carex aquatilis - Carex spp. Herbaceous Vegetation » more details accession code: VB.CC.26520.CAREXAQUATILISC	Midwestern Ecology Working Group...	0	This water sedge community type is found in the northern Great Plains and northern tallgrass prairie region of the United States and Canada. Stands typically occur in depressions or around ponds or lakes, although they may also develop adjacent to streams or rivers. They are flooded for some time during the growing season in most years and have mostly mineral soils in fresh or slightly saline water. The vegetation is dominated by graminoids approximately 0.4-0.7 m tall. Carex spp. predominate, especially Carex aquatilis, as well as Carex rostrata, Carex lacustris, and Carex stricta. Eleocharis palustris, Schoenoplectus spp. (= Scirpus spp.), and Typha spp. may all be found in this community. Scolochloa festucacea may be found in drier stands. Woody species are rare, but shrub species may include Salix spp.
Comm #5387	V.A.5.N » more details accession code: VB.CC.345.VA5N	EcoArt 2002	0
Comm #5388	CEGL007984 » more details accession code: VB.CC.7528.CEGL007984 NOT CURRENTLY ACCEPTED	EcoArt 2002	0
Comm #5389	Spartina alterniflora / (Ascophyllum nodosum) Acadian/Virginian Zone Herbaceous Vegetation » more details accession code: VB.CC.31083.CEGL004192	Eastern Ecology Working Group of...	0	This tall grassland dominated by <i>Spartina alterniflora</i> forms the low salt marsh of the north and mid-Atlantic coast. It is diurnally flooded by tides, occurring in the intertidal zone between mean high tide and mean sea level in protected inlets behind barrier beaches or in the seaward reaches of drowned river valleys. It forms a coarse peat over sandy substrate. The low salt marsh occurs elevationally between high marsh that occurs landward and subtidal communities that occur seaward. <i>Spartina alterniflora</i> is limited to the low marsh zone by interspecific competition and by moderate salinity; it can withstand longer submergence than other salt marsh grasses but still requires periodic exposure of the substrate. <i>Spartina alterniflora</i> forms nearly monotypic stands with little variation across the geographic range of the community. Tall form <i>Spartina alterniflora</i> occurs adjacent to salt water and colonizes unvegetated flats. Associated species occur in low abundance and commonly include <i>Limonium carolinianum, Salicornia virginica, Salicornia bigelovii, Spergularia maritima, Spergularia canadensis</i>, and <i>Suaeda maritima</i>. Brown algae can form extensive mats at the bases of the grass culms, especially <i>Ascophyllum nodosum, Fucus vesiculosus, Enteromorpha</i> spp., and <i>Ulva</i> spp. Macroalgae associates may be sparse or absent at the southern edge of the range. This community occurs from Labrador to Virginia. Low marshes at the northern edge of the geographic range are far less extensive in size than those farther south due to differences in geomorphology and time since last glaciation.
Comm #5390	Populus fremontii Seasonally Flooded Woodland Alliance » more details accession code: VB.CC.18383.POPULUSFREMONTI	Western Ecology Working Group of...	0	Vegetation types within this alliance occur primarily on relatively flat floodplains (3-5% slope) along low-gradient rivers. Stands are found as gallery forests along perennial or seasonally intermittent streams and springs. They typically occupy the more mesic or hydric areas of the floodplain. Elevations range from 400-2000 m. Soils are derived from alluvial materials, deposited in stratified layers of clays, sands, silts, and gravels. Soil textures are variable but mainly sandy. Surface water is present for extended periods during the growing season, but is absent by the end of the growing season. The water table after flooding ceases is variable, extending from saturated to well below the ground surface. Adjacent upland communities are typically pinyon-juniper or oak shrublands. Communities within this alliance are classified as seasonally flooded woodlands. The canopy is dominated by open stands of Populus fremontii generally forming 30-70% cover. Salix geyeriana commonly occurs in the shrub layer in the Nevada stands. In New Mexico, the herbaceous layer is dominated by Muhlenbergia rigens with 30% cover. No other information on species composition is available.