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Add/Drop	Name	Reference	Plots↓	Description
Comm #5501	A.303 » more details accession code: VB.CC.1929.A303 NOT CURRENTLY ACCEPTED	EcoArt 2002	0	Vegetation types within this alliance occur at lower elevations, 1100-1500 m, in the American Southwest. Detailed information on landforms, soils, and adjacent vegetation was not available. Vegetation types within this alliance are classified as temporarily flooded, cold-deciduous forests. The tree subcanopy can range from open to dense with 60-100% cover of ~Sapindus saponaria$ and ~Juglans major$. Other trees present in the tree subcanopy can include ~Arbutus xalapensis (= Arbutus texana)$ or ~Juniperus deppeana$. The tall- and short-shrub layers are present with 25-60% cover and can include ~Mahonia fremontii (= Berberis fremontii), Celtis laevigata var. reticulata (= Celtis reticulata), Morus microphylla, Prunus serotina, Rhus trilobata$, and ~Ptelea trifoliata ssp. angustifolia (= Ptelea angustifolia)$. The vine layer is typically present with 25-60% cover and is dominated by ~Vitis arizonica$. The herbaceous layer is present, but there was no available percent cover given. Common herbaceous species include ~Bouteloua curtipendula, Brickellia brachyphylla, Chenopodium album, Croton pottsii, Phaseolus filiformis (= Phaseolus wrightii)$, and ~Elymus elymoides (= Sitanion hystrix)$.
Comm #5502	Quercus laurifolia - Quercus lyrata / Carpinus caroliniana - Persea palustris / Vaccinium elliottii Forest » more details accession code: VB.CC.18682.QUERCUSLAURIFOL	Southeastern Ecology Working Gro...	0	This community type covers forests of blackwater river terraces and ridges, in the Atlantic Coastal Plain of the Carolinas and possibly Virginia. It is distinguished from some related types by its lacking a significant component of levee species. This community occurs on low blackwater bottomland situations, and has a significant component of Quercus lyrata and generally lacks a significant component of Pinus taeda.
Comm #5503	Tripsacum dactyloides - Panicum virgatum - Sorghastrum nutans - Helianthus maximiliani Herbaceous Vegetation » more details accession code: VB.CC.35115.CEGL002217	Southeastern Ecology Working Gro...	0	This tallgrass community of the Crosstimbers/Southern Tallgrass is dominated by <i>Tripsacum dactyloides</i> and <i>Panicum virgatum</i> occurring with <i>Sorghastrum nutans, Carex microdonta, Schizachyrium scoparium, Sporobolus compositus, Paspalum floridanum</i>, and <i>Andropogon gerardii</i>. Important forbs include <i>Symphyotrichum ericoides (= Aster ericoides), Acacia angustissima var. hirta, Rudbeckia hirta</i>, and <i>Helianthus maximiliani</i>. This community occurs on poorly drained or subirrigated soils and flat topography on the Blackland and Fayette prairie regions of Texas. Similar communities may exist as small patches in Oklahoma and Kansas. Gilgai microtopography, with circular depressions and ridges, is characteristic of this community where it occurs over Vertisols.
Comm #5504	Opuntia (fragilis, polyacantha, phaeacantha) Shrubland » more details accession code: VB.CC.31914.CEGL004009	Western Ecology Working Group of...	0	This succulent-dominated dwarf-shrubland is known only from Canyon de Chelly National Monument in northeastern Arizona in the southern Colorado Plateau. It occurs in canyons on terraces and alluvial fans at the base of cliffs from 1755 to 1787 m (5758-5863 feet) elevation. Stands occur on gentle slopes (1-11%) with generally hot, south-facing aspects. One stand is seasonally flooded. The soils are sandy loam in texture. There is moderate to high cover of bare ground. The vegetation is characterized by an open to moderately dense succulent dwarf-shrub layer dominated by <i>Opuntia</i> species. <i>Opuntia phaeacantha, Opuntia polyacantha</i>, or <i>Opuntia whipplei</i> may dominate solely or in combination with the others. Other shrubs may be present, including <i>Artemisia filifolia, Artemisia tridentata</i>, and <i>Gutierrezia sarothrae</i>. The sparse to moderately dense herbaceous layer has a diversity of species. Common herbaceous species are <i>Astragalus lentiginosus, Bouteloua gracilis, Chaetopappa ericoides, Conyza canadensis, Croton texensis, Hesperostipa comata ssp. comata, Heterotheca villosa, Lappula occidentalis, Solanum elaeagnifolium</i>, and <i>Sphaeralcea fendleri</i>. The native annual forb <i>Plantago patagonica</i> may dominate after good spring precipitation. The annual exotic grass <i>Bromus tectorum</i> is generally abundant with 1-5% cover. Other exotic species include <i>Cynodon dactylon, Erodium cicutarium</i>, and <i>Salsola kali</i>.
Comm #5505	Pinus contorta / Vaccinium caespitosum / Clintonia uniflora Forest » more details accession code: VB.CC.32161.CEGL005923	Western Ecology Working Group of...	0	This lodgepole pine forest association is a minor small- to large-patch type reported from northwestern Montana and southwestern Canadian Rockies, (it is not reported for northern Idaho), and is a minor type on the Colville and Okanogan national forests of northeastern and north-central Washington. In Montana its elevation range is documented to be 945 to 1650 m (3100-5400 feet); in northeastern Washington it occurs from 610 to 1525 m (2000-5000 feet). In Montana it is described from basins and river terraces and benchlands often having restricted drainages. In Washington it occurs predominantly on xero-riparian sites located in valley bottoms. The commonality of these environments is their potential to be frost pockets or at least areas where cold air ponds; daytime temperatures are contrastingly warm. Parent materials include volcanic ash deposited over glacial drift, coarse alluvium or fine alluvium over, or with, an appreciable gravel content, glacial till. Upper soil profiles are well- to excessively drained, but the compacted subsoils promote seasonally high water tables. The upper canopy generally has an open structure, dominated by <i>Pinus contorta</i> with well-scattered <i>Pseudotsuga menziesii</i> and <i>Larix occidentalis</i>. The subcanopy usually has low cover and is a mix of <i>Abies lasiocarpa, Picea engelmannii</i>, and occasionally <i>Abies grandis</i>. A tall-shrub component is conspicuously absent. The short-shrub component has a minor representation with <i>Vaccinium membranaceum, Spiraea betulifolia, Lonicera utahensis, Paxistima myrsinites, Amelanchier alnifolia, Shepherdia canadensis</i>, and <i>Juniperus communis</i> consistently present and the first-named often having cover in excess of 10%. The dwarf-shrub layer is the dominant component and, within it the appreciable cover (at least 3%) of <i>Vaccinium caespitosum</i>, is strongly indicative of a frosty microclimate and perhaps well-drained substrates. Other high-constancy (and variable cover) dwarf-shrubs include <i>Linnaea borealis, Arctostaphylos uva-ursi, Mahonia repens (= Berberis repens)</i>, and <i>Chimaphila umbellata</i>. <i>Calamagrostis rubescens</i> and <i>Carex concinnoides</i> have very high constancy, and <i>Calamagrostis</i> cover is generally in excess of 10%, even capable of forming a sward that partially obscures the dwarf-shrub layer. The diverse forb component, in addition to the indicator <i>Clintonia uniflora</i>, regularly contains <i>Hieracium albiflorum, Osmorhiza berteroi (= Osmorhiza chilensis), Cornus canadensis, Viola orbiculata, Maianthemum stellatum (= Smilacina stellata), Maianthemum racemosum (= Smilacina racemosa), Arnica latifolia</i>, and <i>Goodyera oblongifolia</i>.
Comm #5506	CEGL000619 » more details accession code: VB.CC.3227.CEGL000619 NOT CURRENTLY ACCEPTED	EcoArt 2002	0
Comm #5507	Clethra alnifolia - Toxicodendron vernix / Aristida stricta - Osmunda cinnamomea - Sarracenia spp. Shrub Herbaceous Vegetation » more details accession code: VB.CC.20234.CLETHRAALNIFOLI	Southeastern Ecology Working Gro...	0	This type covers seepage-fed herbaceous or shrub-herb wetlands of sandhills terrain found primarily in the Sandhills region but present in scarps and sand ridges elsewhere in the Coastal Plain of North Carolina and South Carolina. These are generally small areas on slopes, but can occur at slope bases where water is forced to the surface by a clay layer and soil conditions are permanently saturated. These communities are rare in the North Carolina Sandhills and on Fort Bragg and Camp MacKall, where they are usually found in high-moisture, open-canopied transitional areas located between streams (or impoundments) and seepage-fed slopes. The permanently saturated conditions of these sites most likely help to retard shrub and tree encroachment. Dominant species include Sarracenia flava, Sphagnum spp., Carex exilis, Rhynchospora stenophylla, Danthonia epilis, Xyris fimbriata, Xyris chapmanii, Eupatorium resinosum, and Rhexia spp. Sandhill seeps consist of a dense to open growth of various wetland shrubs and herbs, or mixtures of wetland and upland species, with structure determined by fire regime. Common shrubs include Clethra alnifolia, Lyonia lucida, Photinia pyrifolia (= Aronia arbutifolia), Ilex glabra, Gaylussacia frondosa, Symplocos tinctoria, Morella caroliniensis (= Myrica heterophylla), and Toxicodendron vernix. A variety of other shrubs may be present in some sites. Arundinaria gigantea ssp. tecta may dominate in places, especially in frequently burned sites. Osmunda cinnamomea often dominates annually burned sites. Canopy species include Pinus serotina, Pinus palustris, and Liquidambar styraciflua. Acer rubrum, Magnolia virginiana, and Persea palustris are often present in the midstory. Herbs are sparse under shrub cover but may dominate frequently burned sites. Typical herbs include Osmunda cinnamomea, Xyris caroliniana, Pteridium aquilinum, Woodwardia virginica, Dichanthelium spp., Andropogon glomeratus, Ctenium aromaticum, Sarracenia flava, Sarracenia purpurea, Sarracenia rubra, Drosera capillaris, Rhexia alifanus, Polygala lutea, Eupatorium pilosum, and Aristida stricta. Sphagnum spp. are common. On frequently burned sites a great diversity of other herbs may also be present. Community structure is strongly controlled by fire regime. Because of their small size, Sandhill Seeps are subject to fires spreading from adjacent sandhill communities, and under natural fire regimes they probably burned more frequently than other similarly wet communities. At least parts of them burned almost as frequently as the adjoining sandhill communities. Under frequent fire Sandhill seeps are open and herb-dominated. In the absence of fire shrubs quickly expand and the vegetation becomes pocosin-like. The nutrient dynamics of these communities are not known. The presence of clay in the soil may allow greater retention of nutrients than in sandy soils, although the seepage is likely to be very low in nutrients. Like other small communities in sandhill areas, nutrients mobilized by fire may be available to Sandhill seeps even if they do not themselves burn. These communities are distinguished by the occurrence of wetland vegetation on seepage slopes. The boundary with Streamhead Pocosin may be difficult to determine in some areas. In infrequently burned areas where both are shrubby, Sandhill seeps may be recognized by partial or total isolation from a stream system, location on a sharp slope break, or by remnants of the herbaceous vegetation beneath the shrubs. Herb-dominated Sandhill seeps may be distinguished by their occurrence on relatively small, sloping, seepage-fed areas in sandhills.
Comm #5508	Purshia stansburiana - Eriogonum corymbosum Shrubland » more details accession code: VB.CC.31858.CEGL004011	Western Ecology Working Group of...	0	This shrubland association is only known from Petrified Forest National Park. This summary is derived from data from five relevés. This association occurs on lower slopes, midslopes, terraces, and mesas between 1740 and 1920 m (5700-6290 feet) elevation. Slope ranges between none to steep (0-22%) (average 9%). Most of the stands have basalt surface rocks, and one has sandstone surface rocks. Total vegetation cover is ranges between 15 and 24% cover (average 18%). The vegetation is characterized by an open shrub layer codominated by <i>Purshia stansburiana</i> and <i>Eriogonum corymbosum</i>, with an open to sparse herbaceous stratum (0.5-6% cover). Species diversity ranges between 20 and 24 species. Other shrubs are often present with low cover, such as <i>Artemisia bigelovii, Atriplex canescens, Ephedra torreyana, Ephedra viridis, Brickellia oblongifolia</i>, and <i>Gutierrezia sarothrae</i>. Common grasses and forbs present include <i>Chamaesyce fendleri, Chamaesyce parryi, Cryptantha crassisepala, Phacelia crenulata, Elymus elymoides</i>, and exotic annual grass <i>Bromus rubens</i>.
Comm #5509	Pascopyrum smithii - (Elymus trachycaulus) Clay Pan Herbaceous Vegetation » more details accession code: VB.CC.36917.CEGL002239	Midwestern Ecology Working Group...	0	This western wheatgrass clay flats prairie type is found in the northern Great Plains of the United States and possibly adjacent Canada. Stands occur on a heavy clay pan, such as can occur along streams and rivers. These clay pans are particularly extensive in western South Dakota. The vegetation is strongly dominated by <i>Pascopyrum smithii</i>. The associated flora may be very simple. Further review of this type is needed.
Comm #5510	Schizachyrium scoparium - Bouteloua curtipendula Chalkflat Herbaceous Vegetation » more details accession code: VB.CC.35967.CEGL002247	Midwestern Ecology Working Group...	0	This little bluestem mixedgrass prairie community is limited to the south-central Great Plains in the United States. Stands occur on nearly level to gently sloping terraces below chalk or limestone outcrops. They are not flooded or saturated during the year. Soils are well-drained and moderately deep to deep. They are strongly calcareous with silty or loamy surface layers and subsoils. The parent material is chalky shale and soft limestone. The vegetation structure is typically a dense stand of short to medium-tall graminoids and forbs. <i>Bouteloua curtipendula</i> and <i>Schizachyrium scoparium</i> are the most abundant. <i>Andropogon gerardii</i> and <i>Buchloe dactyloides</i> are also typically found in this community. <i>Sporobolus cryptandrus, Distichlis spicata, Eriogonum effusum, Gutierrezia sarothrae, Oenothera macrocarpa, Stanleya pinnata</i>, and <i>Atriplex canescens</i> are among many species characteristic of this community.