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Add/Drop	Name	Reference	Plots↓	Description
Comm #12931	Abies lasiocarpa / Paxistima myrsinites Woodland » more details accession code: VB.CC.26592.ABIESLASIOCARPA	Western Ecology Working Group of...	0
Comm #12932	CEGL001820 » more details accession code: VB.CC.4375.CEGL001820 NOT CURRENTLY ACCEPTED	EcoArt 2002	0
Comm #12933	Alnus incana / Athyrium filix-femina Shrubland » more details accession code: VB.CC.34603.CEGL002628	Western Ecology Working Group of...	0	This association is a locally common association found at low elevations from about 701 to 2074 m (2300-6800 feet), in cool and moist, often maritime-influenced, regions of Idaho, Washington, Oregon, and adjacent non-coastal areas. This association often occurs on floodplains, streambanks, and overflow channels of perennial streams that vary in gradient and valley width. These sites usually have soil ranging from silty loam to sandy-gravelly loam over cobble alluvium. The association is also sometimes sampled in wetlands with organic loam soils on the margins of springs, oxbows, lakes, and sediment-filled beaver ponds. <i>Alnus incana</i> forms an open to partially closed canopy, averaging 5-6.5 m tall, typically having 30-60% cover. <i>Picea engelmannii</i>, or <i>Thuja plicata</i> in maritime-influenced areas, occur with moderate constancy, possibly indicating successional pathways for this type. Other shrubs with high constancy, but mostly low cover, include <i>Cornus sericea, Ribes lacustre, Ribes hudsonianum, Rubus parviflorus</i>, and <i>Symphoricarpos albus</i>. <i>Athyrium filix-femina</i> with 20-75% cover, sometimes with lesser amounts of <i>Gymnocarpium dryopteris</i>, forms a lush fern layer, up to 1.0 m tall. <i>Cinna latifolia</i> up to about 20% cover, with less abundant <i>Carex deweyana, Carex disperma, Glyceria striata</i>, and <i>Scirpus microcarpus</i>, are the most common graminoids. Tall forbs, such as <i>Maianthemum stellatum, Mertensia paniculata, Senecio triangularis</i>, and <i>Streptopus amplexifolius</i>, frequently occur with low cover, and a low-forb ground layer (composed of species such as <i>Boykinia major, Circaea alpina, Claytonia cordifolia, Equisetum arvense, Mitella pentandra</i>, and <i>Trautvetteria caroliniensis</i>) also exists.
Comm #12934	Pseudoroegneria spicata - Achnatherum hymenoides Herbaceous Vegetation » more details accession code: VB.CC.26730.PSEUDOROEGNERIA	Western Ecology Working Group of...	0	This sparse grassland association has been described from western Colorado, south-central Wyoming, and southwestern Montana. Stands occupy rocky or badland slopes with shallow, usually unstable soils. Common species in the sparse vegetation are Pseudoroegneria spicata (which generally dominates) and Achnatherum hymenoides (= Oryzopsis hymenoides). Among the other species which may be present, usually in small amounts, are Gutierrezia sarothrae, Aristida purpurea var. longiseta (= Aristida longiseta), Artemisia tridentata ssp. wyomingensis, Phlox spp., Artemisia frigida, and Ericameria spp. (= Chrysothamnus spp.).
Comm #12935	Artemisia tridentata ssp. vaseyana / Achnatherum occidentale Shrubland » more details accession code: VB.CC.19494.ARTEMISIATRIDEN	Western Ecology Working Group of...	0	This is a sagebrush opening in Pinus contorta or Pinus ponderosa forests in the East Cascades and Modoc Plateau of south-central Oregon and northeastern California. It is found between 4800 and 4900 feet in elevation on very deep Mazama ash deposits under 5-7 inches of loamy sand. Artemisia tridentata ssp. vaseyana is the dominant shrub, with up to 10-30% cover in the Deschutes National Forest and 55% in the one plot from central Oregon. Achnatherum occidentale (= Stipa occidentalis) is the only grass reported from this community in central Oregon, while Carex rossii and Elymus elymoides were occasional in the East Cascades. Prominent forbs are Eriogonum flavum, Eriogonum umbellatum, Eriogonum ovalifolium, Polygonum phytolaccifolium, Lupinus spp., Eriophyllum lanatum and Antennaria dimorpha.
Comm #12936	Pseudotsuga menziesii - Lithocarpus densiflorus Forest Alliance » more details accession code: VB.CC.18157.PSEUDOTSUGAMENZ	Western Ecology Working Group of...	0	This forest alliance occurs in the maritime-influenced mountains of northern California and southern Oregon. This region has mild winter temperatures, hot summers, and receives winter rain followed by summer drought. Drought stress is ameliorated somewhat by fogs in coastal stands. These forests occur along low- to moderate-elevation (0-1300 m) mountain slopes and valley margins, with an increasing affinity for moist topographic positions away from the coast and southward. These forests are characterized by a tall (50 m), open canopy of Pseudotsuga menziesii. Other coniferous trees that may be present in the upper tree layer include Sequoia sempervirens, Pinus lambertiana, Pinus ponderosa, and Chamaecyparis lawsoniana, depending upon location and stand history. The hardwood subcanopy is dominated by Lithocarpus densiflorus. Other sclerophyllous or broad-leaved cold-deciduous trees. such as Umbellularia californica, Chrysolepis chrysophylla (= Castanopsis chrysophylla), Cornus nuttallii, Arbutus menziesii, Quercus chrysolepis. and Acer macrophyllum. may be present. The needle-leaved evergreen Taxus brevifolia may also be part of the subcanopy, particularly in moist ravines. The tall-shrub layer is usually species-rich, well-developed, and includes species such as Gaultheria shallon, Rhododendron occidentale, Quercus sadleriana, Vaccinium uliginosum, Vaccinium ovatum, Acer circinatum, Symphoricarpos albus, Lonicera hispidula, Toxicodendron diversilobum, and Corylus cornuta var. californica. The herbaceous layer is usually sparse and dominated by shade-tolerant forbs such as Achlys triphylla, Trientalis borealis ssp. latifolia (= Trientalis latifolia), Asarum caudatum, Trillium ovatum, Oxalis oregana, and Maianthemum stellatum. Common graminoids include Festuca occidentalis, Elymus glaucus, Bromus vulgaris, Luzula parviflora, and Xerophyllum tenax. Diagnostic of this forest alliance is an open upper tree canopy dominated by Pseudotsuga menziesii with a sclerophyllous subcanopy of Lithocarpus densiflorus.
Comm #12937	Quercus nigra - Quercus phellos / Carya myristiciformis - Sabal minor / Carex cherokeensis Forest » more details accession code: VB.CC.25488.QUERCUSNIGRAQUE	Southeastern Ecology Working Gro...	0	This riparian forest occurs along the southwestern periphery of the Upper West Gulf Coastal Plain in Texas. The canopy of this forest association is dominated by Quercus nigra and Quercus phellos, and is distinguished from other bottomland forests by the presence of Quercus similis, Carya myristiciformis, and Ulmus crassifolia. Midstory shrubs include Ilex longipes, Crataegus viridis, Crataegus marshallii, Crataegus spathulata, Ulmus alata, Forestiera ligustrina, Fraxinus americana, and Ilex decidua. The herbaceous layer dominants in plot samples in eastern Texas are Carex cherokeensis and Poa autumnalis. Other important herbaceous species are Chasmanthium latifolium, Phanopyrum gymnocarpon, Dichanthelium commutatum, Elymus virginicus, Carex caroliniana, and Carex flaccosperma.
Comm #12938	Alnus incana / Lysichiton americanus Shrubland » more details accession code: VB.CC.34421.CEGL002629	Western Ecology Working Group of...	0	This association is found between 573 to 1098 m (1880-3600 feet) elevation in maritime climate-influenced areas along both the western and eastern slopes of the Cascades in Washington and Oregon, and in the southern end of the Canadian Rockies of northeastern Washington and far northern Idaho. It is a wet association almost totally restricted to low-gradient sites, predominantly found in moderate width valleys. It is most commonly found in wetlands along pond and lake margins, on organic loam and muck soils with up to 50% of the surface flooded during the spring. <i>Alnus incana</i> (8-10 m tall) dominates this association with 30-70% cover, although <i>Cornus sericea</i> and <i>Spiraea douglasii</i> commonly occur with moderate constancy and cover. <i>Thuja plicata</i> often occurs, but with low cover, and its presence may indicate a potential successional pathway for the stand. The only forb with high cover is <i>Lysichiton americanus</i>, about 10-40% cover. <i>Athyrium filix-femina, Circaea alpina, Equisetum</i> spp., <i>Viola</i> spp., and other forbs or ferns with low to moderate cover may form a ground layer. The only graminoids with high constancy (but low cover) are <i>Glyceria striata</i> and <i>Phalaris arundinacea</i>. Moderate ground cover of moss, including <i>Sphagnum</i> spp., is sometimes observed.
Comm #12939	Alternanthera philoxeroides Herbaceous Vegetation » more details accession code: VB.CC.36332.CEGL003858	Southeastern Ecology Working Gro...	0	This vegetation occurs in the upper reaches of artificial impoundments, as well as in slow-moving water of streams in the Coastal Plain, and is dominated by monospecific stands of <i>Alternanthera philoxeroides</i>, an exotic species.
Comm #12940	CEGL006003 » more details accession code: VB.CC.6591.CEGL006003 NOT CURRENTLY ACCEPTED	EcoArt 2002	0