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Add/Drop	Name	Reference	Plots↓	Description
Comm #11631	Picea engelmannii / Galium triflorum Forest » more details accession code: VB.CC.33560.CEGL002174	Western Ecology Working Group of...	0	This is a wet forest type that occurs in southwestern Montana, eastern Idaho, and western Wyoming. It occurs on alluvial terraces and bottomlands, moist benches bordering streams, and it can also occur on moist toeslopes. It is not entirely restricted to riparian settings. It ranges in elevation from 854 to 2151 m (2800-7052 feet). Sites can be flat, gently sloping to undulating. Soils are mostly derived from alluvial deposits; litter is nearly always present, and wet sites can have organic layers over 50 cm thick. Stands are generally dominated in the upper canopy by <i>Picea engelmannii, Picea glauca</i>, or the hybrid between them. <i>Abies lasiocarpa</i> may be present but not abundant. <i>Pseudotsuga menziesii, Pinus contorta, Picea pungens</i>, and <i>Populus</i> species may be present in small amounts, especially if the site has been disturbed. Shrub layer is minor but may include <i>Alnus incana, Ribes</i> spp., <i>Rubus idaeus, Linnaea borealis, Symphoricarpos albus</i>, and <i>Lonicera utahensis</i>. The herbaceous layer is dominated by forbs and is depauperate of graminoid species. <i>Galium triflorum, Actaea rubra</i>, and <i>Streptopus amplexifolius</i> are generally abundant and are indicators of a wet site. Other common forbs include <i>Aconitum columbianum, Thalictrum</i> sp., <i>Rudbeckia occidentalis, Osmorhiza berteroi, Heracleum maximum</i>, and <i>Geranium richardsonii</i>. This type is distinguished from similar associations by the dominance of <i>Picea engelmannii</i> and the lack of robust <i>Abies lasiocarpa</i>.
Comm #11632	Juncus falcatus - Trifolium wormskioldii Herbaceous Vegetation » more details accession code: VB.CC.17764.JUNCUSFALCATUST	Western Ecology Working Group of...	0
Comm #11633	CEGL000049 » more details accession code: VB.CC.2677.CEGL000049 NOT CURRENTLY ACCEPTED	EcoArt 2002	0
Comm #11634	A.266 » more details accession code: VB.CC.1876.A266 NOT CURRENTLY ACCEPTED	EcoArt 2002	0	This alliance includes montane forests, mainly of the southern and central Appalachians, dominated by ~Fagus grandifolia, Betula alleghaniensis$, and ~Aesculus flava$, occurring in combination or with strong dominance by one of these species. Other species that may form a typically minor canopy component include ~Acer saccharum, Betula lenta, Halesia tetraptera var. monticola, Picea rubens, Prunus serotina var. serotina, Quercus rubra$, and ~Tilia americana var. heterophylla$. Subcanopy species can include small stems of canopy species as well as ~Acer spicatum, Acer pensylvanicum, Amelanchier laevis$, and ~Sorbus americana$. Shrub density varies between associations, ranging from very high to entirely lacking. Common species in the shrub and sapling strata include ~Acer pensylvanicum, Acer spicatum, Amelanchier arborea var. austromontana, Aristolochia macrophylla, Cornus alternifolia, Crataegus punctata, Hydrangea arborescens, Ilex montana, Ribes cynosbati, Ribes rotundifolium, Ribes glandulosum, Rubus allegheniensis, Rubus canadensis, Vaccinium erythrocarpum$, and ~Viburnum lantanoides$. The composition of herbaceous strata varies between associations. Variability in the herbaceous stratum may be related to aspect, elevation, and soil-nutrient status. Forests on drier, south-facing sites (often open convex slopes) typically have dense herbaceous cover, often approaching 100% coverage, and dominated by species of ~Carex$ (~Carex aestivalis, Carex brunnescens ssp. sphaerostachya, Carex debilis var. rudgei, Carex intumescens, Carex pensylvanica$), while more mesic sites have herbaceous strata dominated by large forbs and patches of ferns, with lesser amounts of sedges. In some forests, seepage areas are common, producing wet microhabitats with unique species assemblages (~Chelone lyonii, Circaea alpina, Rudbeckia laciniata, Impatiens pallida$, and ~Monarda didyma$). Woody vines, and vining shrubs, may be common, especially in boulderfield associations. Other typical herbaceous species for this alliance include ~Ageratina altissima var. roanensis, Anemone quinquefolia, Angelica triquinata, Arisaema triphyllum, Eurybia chlorolepis (= Aster chlorolepis), Athyrium filix-femina ssp. asplenioides, Cardamine clematitis, Actaea podocarpa (= Cimicifuga americana), Actaea racemosa (= Cimicifuga racemosa), Circaea alpina, Claytonia caroliniana, Clintonia borealis, Prosartes lanuginosa (= Disporum lanuginosum), Dryopteris campyloptera, Dryopteris intermedia, Dryopteris marginalis, Erythronium umbilicatum ssp. monostolum, Hylocomium splendens, Luzula acuminata, Maianthemum canadense, Medeola virginiana, Oxalis montana, Phacelia bipinnatifida, Phacelia fimbriata, Poa alsodes, Prenanthes altissima, Prenanthes roanensis, Rugelia nudicaulis, Saxifraga micranthidifolia, Solidago curtisii (= Solidago caesia var. curtisii), Solidago glomerata, Stellaria corei, Stellaria pubera, Streptopus lanceolatus var. roseus (= Streptopus roseus), Tiarella cordifolia, Thelypteris noveboracensis$, and ~Trillium erectum$. These forests occur in a cool, humid climate, typically at high elevations (3500-6000 feet; 1066-1828 m) on a variety of sites, from upper concave slopes and steep, periglacial boulderfields and talus slopes, to flat ridgetops and saddles between ridges. Associations will vary with elevation, latitude, and geology and occur as small to large patches surrounded by other forest types, montane grasslands, or shrublands.
Comm #11635	Populus tremuloides / Physocarpus monogynus Forest » more details accession code: VB.CC.25282.POPULUSTREMULOI	Western Ecology Working Group of...	0
Comm #11636	Pinus contorta - Picea mariana / Vaccinium vitis-idaea / Pleurozium schreberi Forest » more details accession code: VB.CC.37317.CEGL002731		0	This matrix or large-patch forest community is widespread in northeastern British Columbia, western Alberta, and southwestern Yukon. It occurs on a wide variety of soils and parent materials where moisture levels are mesic to submesic (occasionally hygric) and nutrient regimes are commonly very poor to poor (sometimes mesic) in British Columbia and poor to medium in Alberta. These stands are characterized by a canopy of <i>Pinus contorta var. latifolia</i>, usually with <i>Picea mariana</i>, and occasionally with some <i>Picea glauca</i>. In the absence of fire (e.g., 100-150 years) <i>Picea mariana</i> may increase as a canopy dominant. The understory is usually sparse and species-poor. A sparse to moderate shrub layer is made up of <i>Ledum groenlandicum</i>, sometimes together with regenerating <i>Picea mariana</i> or <i>Alnus viridis</i>. A dense cover of mosses is dominated by <i>Pleurozium schreberi</i> with <i>Hylocomium splendens</i> and <i>Ptilium crista-castrensis</i>. Commonly, there is moderate cover of <i>Cornus canadensis</i> and <i>Vaccinium vitis-idaea</i> with lesser amounts of <i>Linnaea borealis</i> and <i>Peltigera</i> species.
Comm #11637	Achnatherum lettermanii - Oxytropis oreophila Herbaceous Vegetation » more details accession code: VB.CC.34671.CEGL002734	Western Ecology Working Group of...	0
Comm #11638	Artemisia filifolia / Bouteloua (curtipendula, gracilis) Shrubland » more details accession code: VB.CC.36267.CEGL002176	Southeastern Ecology Working Gro...	0	This sagebrush shrubland is found on sandy rolling hills in the southern Great Plains of the United States, ranging from Kansas south to Texas. It is also known to occur at 1930 m (6325 feet) elevation on gently rolling hills and sandy alluvial plains within the Salinas Pueblo Missions National Monument in New Mexico and between 1960 and 2160 m (6430-7090 feet) on a variety of aspects and landforms, including gently rolling, old lavaflows, gently sloping coppice dunes, or lower dipslopes of low sandstone hills at El Malpais National Monument. Soils are loamy fine sand to sandy, excessively drained, and formed in loamy or sandy eolian sediments. The ground surface is characterized by large patches of exposed soil and scattered areas of grass and litter. The shrub layer is between 0.5 and 1 m tall and dominated by <i>Artemisia filifolia</i> with <i>Chrysothamnus pulchellus</i> as a frequent associate at some sites. Occasionally <i>Pinus edulis</i> or <i>Pinus ponderosa</i> are scattered, but typically trees are absent in these sandy shrublands. Short to medium grasses dominate the ground layer, including <i>Bouteloua curtipendula</i> and <i>Bouteloua gracilis</i>. Other graminoids include <i>Andropogon hallii, Aristida purpurea, Cyperus schweinitzii, Paspalum setaceum, Pascopyrum smithii, Schizachyrium scoparium</i>, and <i>Sporobolus cryptandrus</i>, among others. Herbs may include <i>Erigeron annuus, Helianthus petiolaris</i>, and <i>Grindelia papposa (= Prionopsis ciliata)</i>. Prairie forb species such as <i>Gaillardia pulchella, Linum lewisii, Machaeranthera tanacetifolia, Melampodium leucanthum, Mirabilis linearis</i>, and <i>Oenothera pallida</i> may be common and characteristic.
Comm #11639	Populus tremuloides - Quercus macrocarpa - Salix spp. / Andropogon gerardii Shrubland » more details accession code: VB.CC.36783.CEGL002182	Midwestern Ecology Working Group...	0	This aspen - oak brush prairie shrubland is found in the aspen parkland regions of the United States and Canada, specifically northwestern Minnesota and southeastern Manitoba. Stands occur on somewhat poorly drained to well-drained, sandy clay loam to loamy fine sandy soils. A sand and gravel subtype occurs on coarse-textured outwash deposits. These soils form in lake-washed glacial till or in sandy lacustrine deposits (of variable thickness) over till. Entisols are common; most soils are strongly calcareous. The vegetation is composed of various amounts of shrubs in a matrix of herbaceous prairie species. <i>Andropogon gerardii</i> and <i>Sporobolus heterolepis</i> are common throughout this community. On drier sites <i>Schizachyrium scoparium</i> and <i>Koeleria macrantha</i> are also important, while on wetter sites <i>Spartina pectinata, Calamagrostis stricta ssp. inexpansa (= Calamagrostis inexpansa)</i>, and <i>Muhlenbergia richardsonis</i> are codominants. The major shrub species are <i>Populus tremuloides, Salix</i> spp. (including <i>Salix humilis</i>), and <i>Quercus macrocarpa</i>. <i>Amelanchier alnifolia, Amorpha canescens, Prunus pumila</i> and <i>Corylus</i> spp. are usually present. The brush layer is generally less than 2 m tall with a total cover of 30-50%. The dominant grasses of most sites are tall or mid grasses. Fires are important to prevent conversion of this community to more wooded types.
Comm #11640	Artemisia tridentata ssp. wyomingensis / (Agropyron cristatum, Psathyrostachys juncea) Seeded Grasses Ruderal Shrubland » more details accession code: VB.CC.32007.CEGL002185	Western Ecology Working Group of...	0	This shrubland association has been observed in western Colorado and eastern Utah, though it is very likely to be more widespread in the western U.S. It occurs on generally level topography that has been or is currently disturbed by land-management activities such as chaining or heavy grazing. Stands have been observed at mid-elevations, though more data are likely to expand this range. The unvegetated surfaces is generally dominated by litter and bare soil. Dead shrubs can be abundant due to past land-treatment activities. Soils are poorly drained to moderately well-drained sandy loams or loamy sands. Most observed sites have been on eolian deposits derived from sandstone. There is a short (1-2 m) open shrub canopy dominated by <i>Artemisia tridentata ssp. wyomingensis</i> with other shrubs contributing low cover. Common associates are <i>Artemisia dracunculus, Artemisia frigida, Chrysothamnus viscidiflorus, Ericameria nauseosa, Gutierrezia sarothrae</i>, and <i>Opuntia</i> spp. Scattered short to medium-tall <i>Pinus edulis</i> and <i>Juniperus osteosperma</i> trees may be present. The herbaceous stratum has sparse to low cover and is characterized by seeded exotic species, especially <i>Agropyron cristatum</i> or <i>Psathyrostachys juncea</i>. <i>Bromus tectorum</i> is another common exotic species. Native species, which may have been seeded or migrated from nearby seed sources, include <i>Achnatherum hymenoides, Aristida purpurea, Bouteloua gracilis, Elymus elymoides, Hesperostipa comata, Poa fendleriana, Sporobolus cryptandrus</i>, and <i>Vulpia octoflora</i>. Nonvascular component is usually poor due to the disturbance of these sites.