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Add/Drop	Name	Reference	Plots↑	Description
Comm #1	CEGL002293 » more details accession code: VB.CC.4803.CEGL002293 NOT CURRENTLY ACCEPTED	EcoArt 2002	0
Comm #2	Tsuga mertensiana - Chamaecyparis nootkatensis / Calamagrostis nutkaensis - Maianthemum dilatatum Woodland » more details accession code: VB.CC.37329.CEGL003784		0	This association is located within a subalpine Wet Hypermaritime Mountain Hemlock Windward Variant (MHwh1) along the outer coast between a potential elevational range of 500 to 1100 m above sea level, from Rivers Inlet beyond northern Vancouver Island northward to Portland Canal, and including the windward Queen Charlotte Islands. This community is located on moderately steep upper to lower slopes on shallow mineral soils receiving abundant seepage. This moderately productive subalpine community has the most productive forest in the MHwh1. <i>Chamaecyparis nootkatensis (= Callitropsis nootkatensis)</i> dominates the well-developed but somewhat scrubby canopy, with variable amounts of <i>Tsuga mertensiana</i>. The shrub layer has sparse to moderate cover and includes mainly the following conifers: <i>Chamaecyparis nootkatensis, Tsuga heterophylla, Thuja plicata</i>, and <i>Tsuga mertensiana</i>. Species in the lightly developed herb layer include <i>Calamagrostis nutkaensis, Lycopodium clavatum, Huperzia haleakalae, Blechnum spicant</i>, and <i>Veratrum viride</i>. Common species in the well-developed moss layer are <i>Scapania</i> spp., <i>Rhytidiadelphus loreus, Hylocomium splendens</i>, and <i>Dicranum majus</i>. Species diagnostic of this community include a scattered coverage of richer site indicators such as <i>Maianthemum dilatatum, Veratrum viride</i>, and <i>Streptopus lanceolatus</i>. A number of species which should be either absent or of insignificant cover include <i>Caltha leptosepala, Nephrophyllidium crista-galli (= Fauria crista-galli), Lysichiton americanus</i>, and <i>Carex</i> spp.
Comm #3	CEGL007560 » more details accession code: VB.CC.7176.CEGL007560	EcoArt 2002	0
Comm #4	Carex leptalea - Parnassia grandifolia - Rhynchospora alba Herbaceous Vegetation » more details accession code: VB.CC.19022.CAREXLEPTALEAPA	Southeastern Ecology Working Gro...	0	This community is a montane, open, herbaceous seep associated with ultramafic geology in the Southern Blue Ridge of Virginia and possibly in North Carolina. This association is graminoid-dominated, but has conspicuous forbs and mat-forming species. The dominant species are Carex leptalea, Packera aurea (= Senecio aureus), Rhynchospora alba, and Parnassia grandifolia. Houstonia serpyllifolia is the aspect dominant in the spring, forming mats with Drosera rotundifolia. Woody species have very low coverage, but may include Physocarpus opulifolius and Alnus serrulata. This community is influenced by magnesium-rich seepage and is found in open areas of gravel and muck associated with stream or spring heads. Other species include Solidago patula, Oxypolis rigidior, Dichanthelium dichotomum, Agrostis perennans, Oenothera fruticosa, Rhynchospora globularis, Rhynchospora capitellata, Castilleja coccinea, Calopogon tuberosus, Xyris torta, Aletris farinosa, Thelypteris palustris, Selaginella apoda, Juncus acuminatus, Linum striatum, and Chelone glabra.
Comm #5	Abies grandis / Arctostaphylos nevadensis Woodland » more details accession code: VB.CC.17872.ABIESGRANDISARC	Western Ecology Working Group of...	0	This is an evergreen conifer woodland association generally found on ridgetops and rocky sites in the eastern Cascades. The name of the type reflects a potential vegetation. The existing vegetation is dominated by Pseudotsuga menziesii and/or Pinus ponderosa in the main canopy. Abies grandis and Pinus contorta var. latifolia can be important in some stands. The tree canopy is mostly open. The undergrowth is patchy often with rocks exposed among a dwarf-shrub layer. Arctostaphylos nevadensis is nearly always present and can be very abundant especially on glacial outwash or till in cold-air drainages. Paxistima myrsinites, Spiraea betulifolia and several Vaccinium species are present or can be abundant. Arctostaphylos patula is associated in some Oregon stands. The herbaceous layer is sparse, patchy and dominated by graminoids, primarily Calamagrostis rubescens, Carex geyeri and Festuca occidentalis.
Comm #6	VII.B.1 » more details accession code: VB.CC.172.VIIB1	EcoArt 2002	0
Comm #7	Tsuga mertensiana - Abies amabilis / Vaccinium ovalifolium - Maianthemum dilatatum Forest » more details accession code: VB.CC.32391.CEGL002617	Western Ecology Working Group of...	0
Comm #8	Quercus marilandica - Juniperus virginiana var. virginiana / Schizachyrium scoparium - Hypericum gentianoides Wooded Herbaceous Vegetation » more details accession code: VB.CC.19124.QUERCUSMARILAND	Midwestern Ecology Working Group...	0	This glade community is found in the Interior Low Plateau region of the midwestern United States, particularly in the Shawnee Hills of southern Illinois, western Kentucky, and southern Indiana. It occupies the upper slopes and ridgetops of south-facing bluffs and escarpments. Bedrock is sandstone, which occurs on the surface as massive outcrops, level benches, and boulders. The substrate is a strongly acidic silt loam, which is thin, poorly developed, and very well-drained (dry to xeric). Quercus marilandica, Quercus stellata, and Juniperus virginiana are the dominant trees, which can be found scattered or in patches throughout the occurrence. These trees are generally small, stunted, and limby. The overstory cover seldom exceeds 50%, and the subcanopy is conspicuously thin or absent. Scattered individuals and patches of shrubs occur in this community, with Vaccinium arboreum and Ulmus alata the most commonly encountered. Schizachyrium scoparium, Danthonia spicata, Andropogon virginicus, and Dichanthelium spp. dominate the herbaceous layer, along with a diverse mixture of forbs.
Comm #9	Alnus incana / Carex scopulorum var. prionophylla Shrubland » more details accession code: VB.CC.22786.ALNUSINCANACARE	Western Ecology Working Group of...	0	This minor, linear wetland appears around 1220 m (4000 feet) elevation in broad, low-gradient valleys with small meandering, incised channels in northeastern Washington. It is restricted to organic soils with a shallow water table. Alnus incana ssp. tenuifolia thickets typically with more than 50% cover appear with only a few other tall shrubs, such as Salix drummondiana. Conifers (Abies lasiocarpa or Picea engelmannii) are often present but never with cover exceeding 5%. Carex scopulorum var. prionophylla dominates or codominates with Calamagrostis canadensis. Few other species are present, although Senecio triangularis usually occurs. The high cover of Alnus incana ssp. tenuifolia and Carex scopulorum var. prionophylla with few other shrubs distinguishes this from other Alnus incana types. This may be the wettest of all Alnus incana ssp. tenuifolia types.
Comm #10	A.629 » more details accession code: VB.CC.2270.A629 NOT CURRENTLY ACCEPTED	EcoArt 2002	0	This alliance is found along streams and rivers and in draws and canyons across much of the northern Great Plains. Stands often have an overstory that is more dense than typical woodland physiognomy. The canopy can be moderately closed to closed. Most of the canopy trees are 6-10 m tall, and they allow significant light to penetrate to the understory. The shrub layer is usually well-developed while the herbaceous layer is moderately to well-developed. The canopy is dominated by ~Fraxinus pennsylvanica$ and sometimes ~Ulmus americana$. Individuals of ~Populus deltoides$ and ~Acer negundo$ are often scattered throughout. The shrub layer is typically dominated by ~Prunus virginiana, Symphoricarpos occidentalis, Symphoricarpos albus$, and ~Ribes$ spp. The herbaceous layer often contains ~Maianthemum stellatum, Galium aparine$, and ~Elymus canadensis$. ^Stands of this alliance are usually on flat to moderately steep slopes near permanent or ephemeral streams. Rarely, it can be found on steep north-facing escarpments. These sites create more mesic microclimates in which the woodland can develop in landscapes otherwise dominated by grasslands. The soils are typically deep and loamy, but in places they can be rocky. Stands are common along riparian areas but are usually distant enough from larger streams that they do not flood or do so for very short periods.