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Add/Drop	Name	Reference	Plots↓	Description
Comm #7621	Schoenoplectus fluviatilis Seasonally Flooded Herbaceous Alliance » more details accession code: VB.CC.18173.SCHOENOPLECTUSF	Midwestern Ecology Working Group...	0	This alliance, found in the midwestern United States and southern Canada, is comprised of tall, coarse-leaved, mixed emergent marsh species, especially Schoenoplectus fluviatilis (= Scirpus fluviatilis). Associated emergent species can include Calamagrostis canadensis, Eupatorium perfoliatum, Sagittaria latifolia, Sparganium eurycarpum, Typha spp., and Verbena hastata. This alliance is found in depressions and near rivers and ponds where the ground is flooded for much of the growing season. The soils are usually mucky and deep.
Comm #7622	A.1156 » more details accession code: VB.CC.930.A1156	EcoArt 2002	0	Human-altered grasslands dominated by ~Cyperus heterophyllus$, along gravelly montane and submontane creeks and rivers in Cuba.
Comm #7623	Quercus palustris - Quercus bicolor - (Liquidambar styraciflua) Mixed Hardwood Forest » more details accession code: VB.CC.20680.QUERCUSPALUSTRI	Midwestern Ecology Working Group...	0	This pin oak - swamp white oak forest community type is found in the central United States. Stands occur on wet, poorly drained depressions. Stands contain a closed to partially open canopy dominated by Quercus palustris and Acer rubrum. Oaks should comprise at least 25% of the dominance in a stand. Other typical canopy associates may dominate, including Liquidambar styraciflua, Nyssa sylvatica, and Quercus bicolor. Other wetland hardwood species can occur, including Acer saccharinum, Betula nigra, Quercus macrocarpa, and Quercus rubra. Shrub and vine species are variable and may include Cornus spp., Lindera benzoin, Parthenocissus quinquefolia, and Sambucus canadensis. Herbaceous species also vary widely.
Comm #7624	CEGL003571 » more details accession code: VB.CC.5532.CEGL003571 NOT CURRENTLY ACCEPTED	EcoArt 2002	0
Comm #7625	Cercocarpus intricatus - (Quercus turbinella) Mixed Shrubland » more details accession code: VB.CC.31657.CEGL005393	Western Ecology Working Group of...	0	This mixed shrubland association is currently described from Grand Canyon National Park in Arizona. More survey and classification work are needed to fully characterize this type. It favors large slickrock expanses punctuated by shallow potholes and depressions filled with sand and typically occurs at 1375 to 1650 m (4500-5300 feet) elevation; however, one stand was sampled as high as 1850 m (6075 feet). This community chiefly occurs on flat to very gentle slopes (1-3°) and seems to show no preference for any particular aspect. Soils are well- to rapidly-drained sandy or silty loams. Sandstone bedrock (37%) dominates the ground cover. Stunted <i>Pinus edulis</i> and <i>Juniperus osteosperma</i> assume shrublike forms and infrequently occur in this shrubland type. Other tall shrubs are essentially absent. A rich and varied short-shrub layer dominated by <i>Cercocarpus intricatus</i> and <i>Quercus turbinella</i> characterizes this association. No other individual species occurs at high cover, although at least 25 different short-shrub species can be present at low individual covers. <i>Ceanothus greggii, Glossopetalon spinescens, Nolina microcarpa</i>, and <i>Rhus trilobata</i> are among the most frequent components of this diverse assemblage. <i>Agave utahensis, Gutierrezia sarothrae</i>, and <i>Artemisia bigelovii</i> are the most frequent dwarf-shrubs, although at least 15 different species can occur. Scattered graminoids occur in fissures in the bedrock and shallow pockets of sandy soil. <i>Aristida purpurea</i> and <i>Tridens muticus</i> occur frequently, while <i>Achnatherum speciosum</i> and <i>Hesperostipa</i> spp. may occur in some stands. Forb cover is very sparse, although forb diversity can be very high; at least 50 different forb species can occur in this association. <i>Hymenopappus filifolius, Eriogonum alatum, Comandra umbellata, Heterotheca villosa, Psilostrophe sparsiflora, Chamaesyce fendleri</i>, and <i>Lesquerella arizonica</i> frequently occur at trace covers.
Comm #7626	VII.C.3.C » more details accession code: VB.CC.365.VIIC3C	EcoArt 2002	0
Comm #7627	Artemisia longifolia Badlands Sparse Vegetation » more details accession code: VB.CC.24318.ARTEMISIALONGIF	Midwestern Ecology Working Group...	0	This longleaf wormwood sparse vegetation type is found in the badlands regions of the northern Great Plains of the United States. Stands are found on sparsely vegetated, eroding slopes or flat clay ridges. Some slopes may be acidic, others more alkaline. Soils are poorly consolidated clays and silts. Stands may be particularly common on bentonite clay bands found on the ridges and slopes of the badlands. The vegetation is sparse, often much less than 10% cover, and species richness is very low. Short shrubs are the most conspicuous. Artemisia longifolia is the most frequent, or it may be associated with Atriplex nuttallii, Eriogonum pauciflorum, or Gutierrezia sarothrae.
Comm #7628	Salix nigra Large River Floodplain Forest » more details accession code: VB.CC.21468.SALIXNIGRALARGE	Southeastern Ecology Working Gro...	0	This riverine community is dominated or codominated by Salix nigra. Often, Salix nigra is generally the sole dominant with few other species present. It occurs on recently deposited ground in the Mississippi River Alluvial Plain and other large river floodplains. This association also includes some "sandbar forest" examples with Platanus occidentalis and Populus deltoides sharing dominance with Salix nigra.
Comm #7629	CEGL004186 » more details accession code: VB.CC.5871.CEGL004186 NOT CURRENTLY ACCEPTED	EcoArt 2002	0
Comm #7630	Festuca rubra - Ambrosia chamissonis Herbaceous Vegetation » more details accession code: VB.CC.18088.FESTUCARUBRAAMB	Western Ecology Working Group of...	0	This association is found on coastal spits and sandy beach berms in the Puget Lowlands of Washington. It may also occur rarely on the Oregon coast, and may have formerly occurred in British Columbia It typically is found on portions of the spit/berm that are relatively stabilized and not exposed to the full force of wind and waves. The association is dominated by the grass Festuca rubra, in relatively open to fully closed stands. The forbs Grindelia stricta and Ambrosia chamissonis are sometimes subdominant and almost always present. The community is typically relatively diverse in composition, with several other salt-tolerant species often present. It is distinguished by the dominance of Festuca rubra and the presence of Ambrosia chamissonis, as well as its habitat of coastal spits or berms.