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Add/Drop	Name	Reference	Plots↓	Description
Comm #5391	Pinus contorta var. murrayana / Sparse Understory Forest » more details accession code: VB.CC.33164.CEGL003069	Western Ecology Working Group of...	0	This forest association is widespread at higher elevations of the Sierra Nevada, California. It is found at the highest elevations of the upper montane, often sharing this position with ~<i>Abies magnifica - Pinus monticola - Pinus contorta var. murrayana</i> Forest (CEGL008616)$$. Together, they straddle the Sierran crest at higher elevations. Stands can cover extensive areas, but most are less than 100 acres due to natural fragmentation of the landscape. Elevations are mostly above 2590 m (8500 feet) and aspects are variable. Slopes range from gentle to somewhat steep, but are predominantly moderate or gentle. The association typically occurs on the lower portions of slopes or on benches. Soils are derived from igneous rocks, primarily granite, but also pumice, rhyolite and andesite, and have sandy loam or gravelly loam textures. Soils are typically well-drained, but may be excessively drained. Sites are characterized by significantly higher levels of surface gravel as compared to other associations in the upper montane of the Sierra Nevada. Litter cover is also generally high. Stands of this association are moderately dense forests with open understories. Tree cover is moderate, averaging 59% cover. Tree overstories are dominated by <i>Pinus contorta var. murrayana</i> with very scattered <i>Abies magnifica</i>. <i>Pinus monticola</i> is a rare member of the stand. The shrub layer is essentially absent, averaging less than 1%, although <i>Ribes montigenum</i> occurs in widely scattered locations, indicating moist conditions. Cover of herbaceous dicots is among the lowest in the upper montane associations, averaging 3%; the species represent a mix of moderate to dry conditions (e.g., <i>Arabis platysperma</i> indicating drier sites and <i>Pyrola picta</i> and <i>Thalictrum fendleri</i> indicating moister sites). Herbaceous monocots average 10% cover, with <i>Carex rossii</i> indicating moister conditions and <i>Achnatherum occidentale</i> indicating drier conditions. Conifer regeneration is moderate, dominated by <i>Pinus contorta var. murrayana</i>, with generally more than 250 seedlings per acre.
Comm #5392	Picea glauca / Vaccinium scoparium Forest » more details accession code: VB.CC.18476.PICEAGLAUCAVACC	Midwestern Ecology Working Group...	0	This white spruce community type is found in the Black Hills region of the United States. It had been found at elevations ranging from 1737-2040 m, where it occurs on calcareous, loamy soils on moderate slopes. The overstory is dominated by successfully reproducing Picea glauca with some mature Populus tremuloides and Pinus ponderosa remaining from earlier seral stages. The shrub layer is the most conspicuous understory layer. It is often dominated by Vaccinium scoparium. In some stands other shrubs may be more abundant, with only scattered Vaccinium scoparium. Other shrubs that are typically found are Arctostaphylos uva-ursi, Juniperus communis, Mahonia repens, Spiraea betulifolia, and Symphoricarpos albus. Major herbaceous species are Achillea millefolium, Galium boreale, Fragaria virginiana, Lathyrus ochroleucus, and Oryzopsis asperifolia. Mosses and lichens are rare to common.
Comm #5393	Poa pratensis Seasonally Flooded Ruderal Herbaceous Vegetation » more details accession code: VB.CC.31804.CEGL003081	Western Ecology Working Group of...	0	This semi-natural grassland is widespread in the western U.S. and northern Great Plains where it has invaded natural meadows and riparian areas. Sites are generally flat to moderately sloping and occur on all aspects. Stands typically occur on pastures found in the plains, montane meadows, stream benches and terraces. In the semi-arid region it is restricted to relatively mesic sites. Soils are highly variable, but <i>Poa pratensis</i> grows best on moist, fertile sandy to clayey alluvium with high organic content. It does not tolerate prolonged flooding, high water tables or poor drainage well. However, it can tolerate mildly alkaline and saline soils, and some drought. The vegetation is characterized by a moderate to dense herbaceous canopy that is strongly dominated by the introduced perennial, sod-forming graminoid <i>Poa pratensis</i>. <i>Poa pratensis</i> has invaded many natural plant associations, but the diagnostic character in this association is that there is typically not enough of the native grassland left to classify it as a poor condition natural type. Associates are often those early-seral and weedy species that tolerate the historic heavy livestock grazing or other disturbance well, such as <i>Achillea millefolium, Cirsium arvense, Elymus repens, Equisetum</i> spp., <i>Fragaria virginiana, Hordeum</i> spp., <i>Juncus balticus, Linaria vulgaris, Potentilla gracilis, Taraxacum officinale</i>, and introduced forage species such as <i>Agrostis stolonifera, Bromus inermis</i>, and <i>Phleum pratense</i>. Remnant natives <i>Pascopyrum smithii, Deschampsia caespitosa</i>, and <i>Carex</i> spp. are often present in low cover. Occasional trees and shrubs may also be present.
Comm #5394	Quercus stellata - Quercus marilandica / Schizachyrium scoparium - Silphium terebinthinaceum Wooded Herbaceous Vegetation » more details accession code: VB.CC.21270.QUERCUSSTELLATA	Midwestern Ecology Working Group...	0	This barrens or post oak openings community is found in the midwestern United States in southern Indiana and Ohio. Stands occur on rolling hill-and-swale topography over limestone or shale bedrock. The soils are stony and excessively well-drained. This is a prominent community on the Mitchell Karst Plain in south-central Indiana. There, it occurs on rolling hill-and-swale topography on a large sinkhole plain over limestone bedrock. Soils are formed from chert residue left from the erosion of limestone bedrock. These soils are stony, acidic, and excessively well-drained. In Ohio, this community occurs in the unglaciated Bluegrass Region, north of West Union in Adams County, where it is found only over Crab Orchard Shale, on slight slopes or mounded outcrops. On slopes, deep erosional gullies are usually present. Crab Orchard Shale is calcareous and weathers to a light brown to yellowish heavy silt loam containing scattered pieces of dolomite. Fire, drought and grazing are factors in maintaining the open woody character of this type. Vegetation may be sparse, consisting of xeric species and stunted individuals of species that reach considerable size elsewhere. Graminoids, such as Schizachyrium scoparium and Sorghastrum nutans, form most of the vegetation cover in this community, but tree canopy species may include Juniperus virginiana var. virginiana, Quercus alba, Quercus imbricaria, Quercus marilandica, Quercus stellata, and Quercus velutina. Herbaceous species which may be present include Aconitum uncinatum, Allium cernuum, Andropogon gerardii, Aristida longispica, Asclepias amplexicaulis, Carex meadii, Danthonia spicata, Eryngium yuccifolium, Euphorbia corollata, Helianthus mollis, Helianthus hirsutus, Houstonia sp., Liatris cylindracea, Liatris squarrosa, Lobelia spicata, Panicum flexile, Pycnanthemum tenuifolium, Rudbeckia hirta, Salix humilis, Silphium trifoliatum, and Sporobolus vaginiflorus.
Comm #5395	CEGL004001 » more details accession code: VB.CC.5790.CEGL004001 NOT CURRENTLY ACCEPTED	EcoArt 2002	0
Comm #5396	CEGL004006 » more details accession code: VB.CC.5791.CEGL004006 NOT CURRENTLY ACCEPTED	EcoArt 2002	0
Comm #5397	CEGL004016 » more details accession code: VB.CC.5792.CEGL004016 NOT CURRENTLY ACCEPTED	EcoArt 2002	0
Comm #5398	Quercus lobata Woodland » more details accession code: VB.CC.31731.CEGL003096	Western Ecology Working Group of...	0	These woodlands are found in California's Coast Ranges, the Great Central Valley, the foothills of the Sierra Nevada, the Cascades and the Klamath Range. Elevation ranges from sea level to 775 m. Stands occur on valley bottoms and gentle slopes and requires intermittently flooded or seasonally saturated soils. The soils are deep and alluvial or residual, and the water must be fresh. Periodic, low intensity floods help maintain this vegetation. Stands are usually found outside the immediate zone of high energy flood waters, in the lower-energy margins of the floodplain. The vegetation is a sclerophyllous evergreen woodland that forms a sparse to dense tree canopy less than 30 m in height. The tree canopy is dominated by <i>Quercus lobata</i>. Other trees in the canopy may include <i>Quercus kelloggii, Quercus douglasii, Quercus agrifolia, Platanus racemosa</i>, and <i>Fraxinus latifolia</i>. A sparse shrub layer (10-25% cover) is present and may include <i>Frangula californica ssp. californica</i>, and <i>Toxicodendron diversilobum</i>. Lianas like <i>Vitis californica</i> and <i>Clematis ligusticifolia</i> are common. The moderately dense herbaceous layer of undisturbed stands is typically dominated by perennial graminoids, such as the rhizomatous <i>Leymus triticoides</i>. Introduced annual grasses dominate the ground layer of disturbed stands.
Comm #5399	Juniperus occidentalis / Cercocarpus ledifolius - Symphoricarpos oreophilus Woodland » more details accession code: VB.CC.18378.JUNIPERUSOCCIDE	Western Ecology Working Group of...	0	This association is found on well-drained and moderately deep soils, of gravelly loam over basalt. This association is usually found at elevations around 1800 m on southern to southwestern aspects of 25-30% slope, in desert mountains. It is usually found in the toeslope position. In this association Juniperus occidentalis has low cover but 100% constancy. Cercocarpus ledifolius cover averages 80%. The physiognomy is intermediate between a woodland savanna and a tall shrubland. Juniperus occidentalis is generally just over 10 m tall, while Cercocarpus ledifolius and other tall shrubs average between 5-10 m in height. The common tall shrubs include Cercocarpus ledifolius, Prunus virginiana, Prunus emarginata, and occasionally Amelanchier alnifolia. Shorter common shrubs include Ericameria nauseosa (= Chrysothamnus nauseosus), Symphoricarpos oreophilus and Artemisia tridentata. Elymus elymoides and Poa secunda are codominant graminoids; Carex rossii and Bromus carinatus are also common. No forbs dominate, although Phacelia heterophylla, Senecio integerrimus, Geum triflorum, and Arabis holboellii are usually found.
Comm #5400	Spartina cynosuroides Herbaceous Vegetation » more details accession code: VB.CC.35111.CEGL004195	Southeastern Ecology Working Gro...	0	This community includes narrow, almost pure stands of <i>Spartina cynosuroides</i> along tidal creeks and sloughs or on levees of oligohaline tidal marshes along the central Atlantic Coast. Some occurrences are nearly monospecific, while others have a diverse component of other graminoids and forbs. Where mixed, associated plants include <i>Schoenoplectus pungens (= Scirpus pungens), Schoenoplectus robustus (= Scirpus robustus), Schoenoplectus americanus (= Scirpus olneyi), Kosteletzkya virginica, Hibiscus moscheutos, Amaranthus cannabinus, Panicum virgatum</i><i>, Peltandra virginica</i>, and <i>Polygonum punctatum</i>. Where more saline, <i>Spartina alterniflora</i> and <i>Iva frutescens</i> can become more frequent. Where less saline, associates can include <i>Schoenoplectus tabernaemontani (= Scirpus validus), Pontederia cordata, Peltandra virginica, Leersia oryzoides, Mikania scandens, Rumex verticillatus, Echinochloa walteri, Polygonum hydropiperoides</i>, and <i>Typha angustifolia</i> (or <i>Typha domingensis</i> in the south), among others. In more disturbed areas, this association can be displaced by <i>Phragmites australis</i>.