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Add/Drop	Name	Reference	Plots↓	Description
Comm #12241	CEGL002495 » more details accession code: VB.CC.4924.CEGL002495 NOT CURRENTLY ACCEPTED	EcoArt 2002	0
Comm #12242	CEGL002499 » more details accession code: VB.CC.4926.CEGL002499 NOT CURRENTLY ACCEPTED	EcoArt 2002	0
Comm #12243	CEGL003002 » more details accession code: VB.CC.5213.CEGL003002	EcoArt 2002	0
Comm #12244	Ephedra torreyana Sparse Vegetation » more details accession code: VB.CC.32012.CEGL002353	Western Ecology Working Group of...	0	This very sparse shrub association is locally common in eastern Utah, occurring on alluvial fans, pediments, terraces, benches, mesas, rocky canyon slopes and stabilized dunes. This community occupies sites that are often actively eroding steep slopes, with pedestalled shrubs and gullies. A few stands are on level to gently sloping sandsheets that are subject to blowouts. Sampled stands are located between 1220 and 1780 m (4000-5840 feet) elevation. Bare ground, rocks and gravel cover most of the unvegetated surface, although biological soil crusts may cover up to 50% of the surface in sandier sites. Soils tend to be rapidly drained, shallow, alkaline sandy loams, clay loams and loamy sands derived from shaly sandstones (or sandy shales) such as the Morrison, Moenkopi, Cutler and Summerville formations. Total vegetation cover ranges from 1 to 15% but is generally less than 10%. The vegetation is dominated or codominated by a sparse canopy of <i>Ephedra torreyana</i> with between 1 and 10% cover. Associated shrubs may include <i>Atriplex confertifolia, Eriogonum leptocladon, Eriogonum corymbosum, Ericameria nauseosa, Gutierrezia sarothrae, Xylorhiza</i> spp., <i>Opuntia</i> spp., and <i>Coleogyne ramosissima</i>. The herbaceous layer may have as much cover as the shrubs but will rarely exceed a few percent and may often be nearly absent. Common herbaceous species include <i>Pleuraphis jamesii, Eriogonum inflatum</i>, and <i>Sphaeralcea</i> spp. <i>Achnatherum hymenoides</i> is absent or has only trace cover. <i>Bromus tectorum</i> may be abundant in disturbed sites.
Comm #12245	CEGL006319 » more details accession code: VB.CC.6821.CEGL006319 NOT CURRENTLY ACCEPTED	EcoArt 2002	0
Comm #12246	Grayia spinosa Shrubland » more details accession code: VB.CC.32004.CEGL002358	Western Ecology Working Group of...	0	This global summary is based on the local description from Arches National Park. More information will be added when it becomes available. This association occurs on benches, plains, and alluvial fans. Soils are rapidly drained clay loam. This spiny hop-sage community is common but may occur as smaller patches in alluvial flat shrublands. Total vegetation cover ranges from 5 to 25%, most of which is concentrated in an open canopy of <i>Grayia spinosa</i> shrubs. Associated shrubs include <i>Coleogyne ramosissima, Ephedra viridis, Gutierrezia sarothrae</i>, and the succulents <i>Opuntia polyacantha</i> and <i>Yucca harrimaniae</i>. The herbaceous layer contributes little to the community, being both sparse and depauperate. Herbaceous species include <i>Pleuraphis jamesii, Chamaesyce fendleri (= Euphorbia fendleri)</i>, and <i>Lepidium montanum</i>. Biological soil crusts provide less than 5% cover.
Comm #12247	Celtis laevigata var. reticulata Slickrock Canyon Woodland » more details accession code: VB.CC.31726.CEGL002359	Western Ecology Working Group of...	0	This netleaf hackberry slickrock woodland association is currently only known from Capitol Reef National Park in Utah, and the following description is based on occurrences there. Additional information will be added as it becomes available. The netleaf hackberry slickrock canyon community was observed in slickrock and associated drainage channels within the park. Sites are gentle to steep (1- to 30-degree slopes), occur between 1250 and 2409 m elevation, and are oriented to all aspects. The unvegetated surface has low to high exposure of bedrock, sand, and bare soil. The cover by litter is sparse to low, and live vegetation basal area can be low to moderate in cover. Parent materials are Navajo sandstone. Soils are rapidly drained and texturally are sand and sandy loam. This netleaf hackberry slickrock canyon community is rare within the park, occupying bedrock exposures and drainage channels in slickrock habitat. This woodland community is characterized by typically 2- to 5-m tall <i>Celtis laevigata var. reticulata</i> trees. The canopy tree layer is moderately diverse, provides sparse to moderate cover, and includes <i>Fraxinus anomala, Juniperus osteosperma, Pinus edulis, Acer negundo</i>, and <i>Populus tremuloides</i>, among several other tree species occasionally present. The shrub layer has moderate to high species diversity and provides low to moderate cover. Tall shrubs commonly to occasionally present include <i>Amelanchier utahensis, Fraxinus anomala, Mahonia fremontii</i>, and <i>Quercus gambelii</i>. Common short and dwarf-shrubs include <i>Ephedra viridis, Ericameria nauseosa, Opuntia polyacantha</i>, and <i>Rhus trilobata</i>. The herbaceous layer is diverse in terms of species composition and provides low to moderate cover. Graminoids commonly present in the community include <i>Achnatherum hymenoides, Bromus tectorum, Poa fendleriana</i>, and <i>Vulpia octoflora</i>. Forbs often present include <i>Artemisia ludoviciana, Castilleja linariifolia, Heterotheca villosa</i>, and <i>Lepidium montanum</i>. The vine <i>Clematis ligusticifolia</i> is often present and typically provides sparse cover.
Comm #12248	Pinus edulis - Juniperus osteosperma / Muhlenbergia pungens Woodland » more details accession code: VB.CC.31125.CEGL002373	Western Ecology Working Group of...	0	This rare, open woodland association is currently documented from Canyonlands and Capitol Reef national parks in southeastern Utah. It occurs on the lower and middle slopes of ridges, on benches, terraces and dunes. Sites are gentle (<5% slopes), occur between 1640 and 2134 m (5379-7000 feet) elevation, and tend to be oriented to northeastern, eastern and southeastern aspects. Parent materials include eolian deposits. Soils are rapidly drained sands. The total vegetation cover generally does not exceed 50%. The vegetation is characterized by an open canopy of <i>Pinus edulis</i> and <i>Juniperus osteosperma</i> trees that range in cover from 10-35% and an understory dominated by the ring-forming grass <i>Muhlenbergia pungens</i> with up to 25% cover. Shrubs do not form a layer (<5% total cover), but scattered individuals of <i>Artemisia frigida, Gutierrezia sarothrae</i>, and <i>Opuntia polyacantha</i> may be present. Associated herbaceous species commonly include <i>Achnatherum hymenoides, Abronia elliptica, Arenaria eastwoodiae, Streptanthella longirostris</i>, and <i>Townsendia incana</i>. One stand above Deep Creek Canyon has moderate cover of cryptogamic soil.
Comm #12249	Juniperus osteosperma / Pleuraphis jamesii Woodland » more details accession code: VB.CC.31988.CEGL002362	Western Ecology Working Group of...	0	This woodland association occurs on valley floors, ridges, and benches in northwestern Colorado and eastern Utah. Sites have gentle to moderate slopes (2-16%), occur between 1341 and 1860 m elevation, and may be oriented to any aspect. The unvegetated surface has high cover of litter and low exposure of bare soil. Soils are well-drained sands, sandy clays, or clay loams derived from shales, sandstones, talus, eolian sands or alluvium. Stands occur in relatively small patches, often in a mosaic with other pinyon-juniper / grass understory woodland types. Total vegetation cover rarely exceeds 60%. The tree canopy consists of <i>Juniperus osteosperma</i> with between 5 and 40% cover. <i>Pinus edulis</i> is generally absent. Scattered shrubs, such as <i>Artemisia tridentata ssp. wyomingensis, Atriplex canescens, Ephedra viridis, Chrysothamnus viscidiflorus, Gutierrezia sarothrae</i>, and <i>Opuntia polyacantha</i>, may be present, but there is no developed shrub layer. The herbaceous stratum is sparse to moderately dense and is dominated by graminoids. <i>Pleuraphis jamesii</i> is dominant to codominant and is generally accompanied by other grasses such as <i>Achnatherum hymenoides, Bouteloua gracilis</i>, or <i>Hesperostipa comata</i>. Forbs are sparse in cover and inconsistent in composition among sites. Biological soil crusts may be well-developed in areas that are protected from grazing.
Comm #12250	Pseudotsuga menziesii / Vaccinium membranaceum / Xerophyllum tenax Forest » more details accession code: VB.CC.32216.CEGL005852	Western Ecology Working Group of...	0	This large-patch to matrix type is manifested as both a seral and climax type from central Idaho north to northern Idaho, eastern Washington, western Montana and southwestern Alberta, and it very probably will be identified for British Columbia. As a climax type this association is most prominent in west-central and central Montana forests. This association's elevation range is rather broad, ranging from 1030 to 2015 m (3100-6600 feet). Virtually the whole of this appreciable elevation range can be realized in a given geographic area due to the type's presence as both a seral and late-successional type. It occupies primarily south- through west-facing, moderate to steep slopes and is usually found on midslope to slope-shoulder positions. It also occurs on benches associated with broad ridges. Soils are well-drained and derived from a broad spectrum of parent materials, including glacial till and drift, both calcareous and noncalcareous sedimentary types, intrusive and extrusive igneous rock and metamorphic types, particularly quartzite. Ground surfaces have little or no bare soil or rock exposed. The canopy structure ranges from moderately open to closed (>60% cover) with <i>Pseudotsuga menziesii</i> being the dominant canopy tree, often joined by lesser amounts of <i>Larix occidentalis</i> and <i>Pinus contorta</i> (sites are beyond the cold limits of <i>Pinus ponderosa</i> for the most part). At its mid to upper elevation limits <i>Abies grandis, Abies lasiocarpa</i>, and <i>Picea engelmannii</i> may be minor components of the overstory and major components of the subcanopy. A tall-shrub layer is absent and even scattered individuals are rare. The short-shrub layer dominates the undergrowth with <i>Vaccinium membranaceum</i> being dominant, often exceeding 50% canopy cover. <i>Spiraea betulifolia, Lonicera utahensis, Paxistima myrsinites, Amelanchier alnifolia</i>, and <i>Rosa gymnocarpa</i> are the other high-constancy species of this layer. Dwarf-shrub layer species that occur with consistence include only <i>Vaccinium scoparium</i> and <i>Mahonia repens (= Berberis repens)</i>. The herbaceous layer is generally relatively depauperate with the diagnostic species <i>Xerophyllum tenax</i> being strongly dominant (average cover reported by various studies ranging from 25 to 61%). Only two graminoids occur consistently and are well-represented in cover, <i>Calamagrostis rubescens</i> and <i>Carex geyeri</i>. Other forbs with moderate to high constancy include <i>Arnica cordifolia, Arnica latifolia, Chimaphila umbellata, Orthilia secunda (= Pyrola secunda), Thalictrum occidentale</i>, and <i>Viola orbiculata</i>; not all of these forbs have high constancy throughout the range of the type.