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Add/Drop	Name	Reference	Plots↓	Description
Comm #6361	Cirsium scopulorum Herbaceous Alliance » more details accession code: VB.CC.25561.CIRSIUMSCOPULOR	Western Ecology Working Group of...	0	Vegetation in this alliance occurs on rocky, talus slopes in the alpine tundra in the Colorado Front Range. Strong westerly winds are common in the winter and spring. Stands are found in the lower alpine tundra between 3350-3450 m elevation on unstable, moving scree slopes. Stands are usually located on south-facing slopes on warm, dry microsites. The ground is covered with cobble-sized rocks and is nearly blown free of snow in the winter. Soils are young and poorly developed. The majority of the ground surface is covered with rock with the vegetation occurring in patches between the rocks. Cirsium scopulorum and Polemonium viscosum are the dominant species. Phacelia sericea, Campanula rotundifolia, Heuchera parvifolia var. nivalis, and Trisetum spicatum are common associates. Moss cover is very sparse due to the dry, rocky substrate.
Comm #6362	Coleogyne ramosissima Shrubland Alliance » more details accession code: VB.CC.22317.COLEOGYNERAMOSI	Western Ecology Working Group of...	0	This alliance occurs at the transition between the Mojave and Great Basin deserts on mountain slopes, mesas or bajadas bordering intermountain basins. Soils are highly variable across the large range of this vegetation type, but are generally coarse-textured and well-drained. This vegetation is characterized by a sparse to moderately dense shrub layer of Coleogyne ramosissima. Although Coleogyne is apparently restricted to a particular elevational zone, associated shrub species can be of either Mojavean or Great Basin affinities. Shrub species may include Menodora spinescens, Picrothamnus desertorum (= Artemisia spinescens), Eriogonum fasciculatum, Ephedra spp., Atriplex spp., Grayia spinosa, Larrea tridentata, Chrysothamnus viscidiflorus, Yucca baccata, Gutierrezia sarothrae, and Opuntia spp. Occasionally, scattered individuals of Yucca brevifolia may be emergent through the shrub layer. The herbaceous layer is typically sparse. Species of Eriogonum, Navarretia, Sphaeralcea, Pleuraphis jamesii (= Hilaria jamesii), Mirabilis multiflora, Achnatherum hymenoides (= Oryzopsis hymenoides), and Achnatherum speciosum (= Stipa speciosa) may be present. Diagnostic of this alliance is the dominance of Coleogyne ramosissima in the shrub layer.
Comm #6363	Acer grandidentatum - Quercus gravesii Forest » more details accession code: VB.CC.35955.CEGL004548	Southeastern Ecology Working Gro...	0	This community occurs in canyons of the Chisos Mountains of Trans-Pecos Texas. It is codominated by <i>Acer grandidentatum</i> and <i>Quercus gravesii</i>. Other species sometimes present include the deciduous <i>Ostrya virginiana var. chisosensis, Quercus muehlenbergii</i>, and <i>Quercus graciliformis</i>, and the evergreen <i>Arbutus xalapensis, Cupressus arizonica, Juniperus deppeana, Juniperus flaccida, Pinus cembroides, Quercus grisea, Quercus emoryi</i>, and <i>Quercus rugosa</i>.
Comm #6364	Quercus nigra / Ilex vomitoria / Chasmanthium sessiliflorum Forest » more details accession code: VB.CC.35313.CEGL004610	Southeastern Ecology Working Gro...	0	This is a small stream forest of the Gulf Coast Prairies and Marshes Ecoregion and possibly adjacent inland areas of the West Gulf Coastal Plain and Upper West Gulf Coastal Plain. <i>Quercus nigra</i> dominates the canopy, with scattered <i>Quercus virginiana</i>. The tall-shrub stratum is dense and consists of <i>Ilex vomitoria</i>. Other shrubs and small trees include <i>Callicarpa americana</i> and <i>Prunus caroliniana</i>. Woody vines include <i>Berchemia scandens, Parthenocissus quinquefolia, Toxicodendron radicans</i>, and <i>Ampelopsis arborea</i>. <i>Chasmanthium sessiliflorum</i> is the dominant herb. Other herbs are <i>Oplismenus hirtellus ssp. setarius (= Oplismenus setarius), Carex cherokeensis, Verbesina virginica, Ageratina aromatica, Asplenium platyneuron var. platyneuron, Geum canadense</i>, and <i>Polygonum virginianum</i>. <i>Tillandsia usneoides</i> and <i>Pleopeltis polypodioides ssp. michauxiana</i> are common epiphytes.
Comm #6365	Tiquilia hispidissima / Bouteloua breviseta - Mentzelia humilis Dwarf-shrubland » more details accession code: VB.CC.35098.CEGL004573	Southeastern Ecology Working Gro...	0	This community occurs on interdune flats in a gypsum dune landscape. The very sparse shrub layer consists of <i>Yucca elata</i> and <i>Artemisia filifolia</i>. The sparse to dense dwarf-shrub layer is dominated by <i>Tiquilia hispidissima</i>, and also includes <i>Krameria lanceolata, Ephedra torreyana</i>, and <i>Nama carnosum</i>. The sparse to dense herb layer includes <i>Bouteloua breviseta, Bouteloua trifida, Mentzelia humilis, Thelesperma megapotamicum, Nerisyrenia linearifolia, Sartwellia flaveriae</i>, and other species, many of them gypsophiles or gypsum endemics.
Comm #6366	Quercus laurifolia - Nyssa biflora / Clethra alnifolia - Leucothoe axillaris Forest » more details accession code: VB.CC.21056.QUERCUSLAURIFOL	Southeastern Ecology Working Gro...	0	This forest occurs in wetter sloughs associated with Quercus michauxii - Quercus pagoda / Clethra alnifolia - Leucothoe axillaris Forest (CEGL007449), on extensive flats with high water table providing seasonally to semipermanently saturated (and rarely flooded) conditions. The canopy is dominated by Quercus laurifolia, with lesser amounts of Nyssa biflora and Acer rubrum var. trilobum often present as well. Clethra alnifolia and Leucothoe axillaris are typical shrubs. This forest is believed to occur from Virginia to Georgia, in the Atlantic Coastal Plain.
Comm #6367	Pinus taeda - Quercus hemisphaerica / Osmanthus americanus / Ilex glabra Woodland » more details accession code: VB.CC.24288.PINUSTAEDAQUERC	Southeastern Ecology Working Gro...	0	This community consists of pine-oak woodlands on sandy swamp islands isolated from fire, or on levees and creek banks where fire is limited. The open to closed canopy is dominated by Pinus taeda and Quercus hemisphaerica. The subcanopy includes Osmanthus americanus var. americanus, Persea palustris, Ilex opaca var. opaca, Quercus nigra, and Quercus hemisphaerica. The shrub layer is characteristically open, and dominated by Ilex glabra; other species may include Vitis rotundifolia and Lyonia lucida. In Florida, Serenoa repens is important.
Comm #6368	Artemisia tridentata / Bouteloua gracilis - Pleuraphis jamesii Shrubland » more details accession code: VB.CC.20936.ARTEMISIATRIDEN	Western Ecology Working Group of...	0
Comm #6369	Holodiscus discolor / Sedum obtusatum ssp. boreale - Cryptogramma acrostichoides Shrubland » more details accession code: VB.CC.24196.HOLODISCUSDISCO	Western Ecology Working Group of...	0
Comm #6370	Alnus maritima ssp. oklahomensis - Amorpha fruticosa Shrubland » more details accession code: VB.CC.34787.CEGL004455	Southeastern Ecology Working Gro...	0	This association is restricted to the Blue River drainage in Johnston and Pontotoc counties, Oklahoma. Stands are dominated by <i>Alnus maritima ssp. oklahomensis</i>, with <i>Amorpha fruticosa</i>. It occurs on cobble bars and riparian zones. Other characteristic species include <i>Boehmeria cylindrica, Chasmanthium latifolium, Equisetum laevigatum</i>, and <i>Platanus occidentalis</i>.