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Add/Drop	Name	Reference	Plots↓	Description
Comm #7021	Equisetum arvense Herbaceous Vegetation » more details accession code: VB.CC.34173.CEGL003314	Western Ecology Working Group of...	0	From Christy (2004): Habitat is seepy alluvial fans, slopes, wet meadows, and fens. This is mostly a low- to mid-elevation association, often occurring in sites with some groundwater movement. It is often small-patch size in water tracks, and the plots suggest considerable inclusions of upland species that may be an artifact of plot size or configuration in a sinuous wetland configuration. Discounting the trees and shrubs that are mostly peripheral to the stand, the primary species in the herb layer is <i>Equisetum arvense</i>, with average cover of 88% and cover ranging from 80-95%. Other wetland associates with lesser cover include <i>Hypericum anagalloides</i> and <i>Mimulus guttatus</i>. Of the other 25 species, nearly half are upland taxa and should not be part of this association. This is a widespread and well-known association in other regions and obviously undersampled locally.
Comm #7022	CEGL000059 » more details accession code: VB.CC.2687.CEGL000059 NOT CURRENTLY ACCEPTED	EcoArt 2002	0
Comm #7023	Juncus effusus var. brunneus Pacific Coast Herbaceous Vegetation » more details accession code: VB.CC.33749.CEGL003317	Western Ecology Working Group of...	0	From Christy (2004): Habitat is meadows, fens, and old pastures. This association is generally thought of as a disturbance type resulting from grazing, but some occurrences suggest that it is native in some places because they are unlikely to have ever been heavily grazed. It is widespread at a variety of elevations but is especially abundant at low elevations in western Oregon. The plots here are from the Coast Range and Cascade Range. Trees are nearly absent but may include <i>Alnus rubra, Fraxinus latifolia, Quercus garryana</i>, or conifers peripheral to the wetland. Eight shrub species are recorded, with <i>Salix sitchensis</i> being most abundant, but their cover is negligible. The herb layer includes about 60 different species, with <i>Juncus effusus</i> being most abundant with an average cover of 52% and ranging from 20 to 85%. <i>Juncus ensifolius (= Juncus xiphioides var. triandrus)</i> is a consistent associate but has very low cover, while <i>Hypericum anagalloides</i> is much more abundant but present with slightly lower constancy. Other species occurring in significant patches include <i>Scirpus microcarpus, Equisetum arvense, Oenanthe sarmentosa</i>, and <i>Athyrium filix-femina</i>, and five species are exotics. Old pastures at low elevations may also have large amounts of <i>Ranunculus repens</i>, but this species was not recorded in these plots.
Comm #7024	Picea sitchensis / Dryopteris campyloptera Forest » more details accession code: VB.CC.25016.PICEASITCHENSIS	Western Ecology Working Group of...	0
Comm #7025	Sagittaria latifolia Herbaceous Vegetation » more details accession code: VB.CC.32766.CEGL003321	Western Ecology Working Group of...	0	From Christy (2004): This herbaceous vegetation occurs from California to British Columbia at 2 to 152 m (6-500 feet) elevation. Habitat is seasonal pools, ponds, sloughs, and freshwater tidal mudflats. This association forms emergent marsh and is primarily a low-elevation wetland type in western Oregon. Stands are flooded early in the season and may dry out as summer progresses, or may remain flooded throughout the growing season, and some are irrigated by daily freshwater tides along the lower Columbia River. They typically occur in floodplain openings ringed by often extensive stands of <i>Salix lucida ssp. lasiandra</i> and are generally too wet for <i>Fraxinus latifolia</i> or <i>Spiraea douglasii</i>. Twenty-nine herbaceous species are recorded from sampled plots, <i>Sagittaria latifolia</i> being the most abundant with an average cover of 52% and ranging from 25-85%. <i>Eleocharis palustris</i> is present in more than half the plots but at low cover. Other species with significant patches include <i>Bidens cernua, Schoenoplectus tabernaemontani, Sparganium angustifolium, Potamogeton natans, Leersia oryzoides</i>, and <i>Eleocharis ovata</i>. Conditions are usually too wet for <i>Phalaris arundinacea</i> except around the edges of ponds and sloughs where competition is intense. <i>Sagittaria latifolia</i> was a well-documented staple food of the Kalapuya and Chinook people and intensively managed (Darby 1996, Boyd 1999). It was probably widespread on floodplains in the Willamette Valley but has become rare because of loss of pond and slough habitat to flood control, agriculture, urban development, and <i>Phalaris arundinacea</i>. The largest populations remaining in the region occur on Sauvie Island.
Comm #7026	Pinus contorta / Vaccinium scoparium Forest » more details accession code: VB.CC.23094.PINUSCONTORTAVA	Western Ecology Working Group of...	0
Comm #7027	Pleomele auwahiensis Woodland Alliance » more details accession code: VB.CC.23143.PLEOMELEAUWAHIE	Western Ecology Working Group of...	0
Comm #7028	Bidens cernua Herbaceous Vegetation » more details accession code: VB.CC.33991.CEGL003324 NOT CURRENTLY ACCEPTED	Western Ecology Working Group of...	0	From Christy (2004): Habitat of this herbaceous vegetation of western Oregon and Washington is low-elevation (2-152 m [8-500 feet]) marsh and mudflats along low-gradient streams and around shallow ponds. Soil is seasonally flooded to perennially saturated silt loam. The association is strictly herbaceous and dominated by <i>Bidens cernua</i> and a variety of other marsh species that tolerate early-season flooding and summer drying that exposes mudflats with subirrigation. Other typical species present in lesser amounts include <i>Polygonum hydropiperoides, Sagittaria latifolia, Eleocharis palustris, Ludwigia palustris</i>, and <i>Leersia oryzoides</i>, but more than 15 other species are recorded. This association was probably fairly widespread in the Willamette Valley prior to flood control but is now mostly restricted to the Columbia River floodplain in the Vancouver Basin. Prolonged pooling in depressions and freshwater tidal flooding along streams helps to keep invasive <i>Phalaris arundinacea</i> from invading stands.
Comm #7029	CEGL000806 » more details accession code: VB.CC.3410.CEGL000806 NOT CURRENTLY ACCEPTED	EcoArt 2002	0
Comm #7030	Andropogon gerardii - Calamagrostis canadensis Sand Wet Meadow » more details accession code: urn:lsid:vegbank.org:commConcept:33941-{308ACE89-E546-4F00-B29B-197D3C217DEA}	NatureServe Biotics 2019	0	This wet-mesic sand prairie community is found in the central midwestern United States. Stands occur on sandy moist soils in shallow swales or lower slopes of sandy outwash plains, lakeplains and valley trains. Graminoids between 1 and 2 m in height dominate the stand. Trees have less than 10% cover, and shrub cover may vary but is usually lower than the graminoid layer. Dominant grasses include <i>Andropogon gerardii, Calamagrostis canadensis, Sorghastrum nutans</i>, and <i>Spartina pectinata</i>. <i>Panicum virgatum</i> can also be present. Forbs include <i>Calopogon tuberosus, Helianthus grosseserratus, Osmunda cinnamomea, Osmunda regalis, Pycnanthemum virginianum, Rhexia virginica, Viola lanceolata, Xyris torta</i>, and <i>Zizia aurea</i>.