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Add/Drop	Name	Reference	Plots↓	Description
Comm #12311	Elaeagnus commutata Shrubland Alliance » more details accession code: VB.CC.19665.ELAEAGNUSCOMMUT	Western Ecology Working Group of...	0	This shrub alliance is found in the northern Great Plains in a mixedgrass prairie matrix. It is dominated by mid to tall shrubs, especially Elaeagnus commutata. Pascopyrum smithii is dominant in the herbaceous layer, typically accompanied by Koeleria macrantha, Schizachyrium scoparium, and Hesperostipa comata (= Stipa comata). Elaeagnus commutata is most abundant on flat sandy sites in southern Saskatchewan.
Comm #12312	Carex interior - Carex lurida - Andropogon gerardii - Parnassia grandifolia Herbaceous Vegetation » more details accession code: VB.CC.36974.CEGL002416	Midwestern Ecology Working Group...	0	This prairie fen community type is found in the Ozarks region of the United States. Stands occur on the valley terraces of larger streams and rivers. Soils are moist to wet, and seasonally saturated by calcareous internal groundwater seepage. Soils are muck or mucky peat, alkaline (pH above 6.5), and shallow (40-100 cm), or, locally, very shallow with gravel at the surface. The parent material is a gravelly alluvium or colluvium over dolomite bedrock. The bedrock strata are detectable. Fires are possible in some of the larger fens. A mix of tallgrass and herbaceous calciphiles dominate the vegetation. Scattered shrubs may occur. Dominant graminoids include <i>Andropogon gerardii, Sorghastrum nutans</i>, and <i>Spartina pectinata</i>. Other characteristic graminoids include <i>Carex interior, Carex lurida</i> and <i>Panicum virgatum</i>. Characteristic forbs include <i>Castilleja coccinea, Helianthus grosseserratus, Helianthus mollis, Lysimachia quadriflora, Lythrum alatum, Oxypolis rigidior, Pycnanthemum tenuifolium, Pycnanthemum virginianum, Rudbeckia fulgida var. umbrosa, Silphium integrifolium, Silphium terebinthinaceum</i>, and <i>Veronicastrum virginicum</i>. More rarely, <i>Platanthera leucophaea</i> may occur.
Comm #12313	CEGL002511 » more details accession code: VB.CC.4935.CEGL002511 NOT CURRENTLY ACCEPTED	EcoArt 2002	0
Comm #12314	CEGL001747 » more details accession code: VB.CC.4305.CEGL001747 NOT CURRENTLY ACCEPTED	EcoArt 2002	0
Comm #12315	Quercus stellata - Quercus marilandica - Quercus falcata / Schizachyrium scoparium Sand Woodland » more details accession code: VB.CC.36858.CEGL002417	Midwestern Ecology Working Group...	0	This post oak - blackjack oak woodland community is found in the alluvial sand terraces of the Upper Mississippi River Delta and lower Wabash River regions of the United States. Stands on Crowley's Ridge occur on dry rolling hills and plains, and on knolls and ridges on terraces. It is associated with well-drained to rapidly drained soils derived from alluvial or eolian deposits. This woodland is part of a forest - woodland - grassland mosaic in which fire and wind play an important role. Periodic fires prevent woody vegetation from excluding the grasses and associated shade intolerant plants, while winds deposit and move the sandy substrate. The vegetation is an oak or mixed hardwood woodland complex with variable tree cover ranging from 10-60%. It is open-grown and often limby with natural pruning by fire. The tree canopy is short to medium in height (7-20 m) and dominated by <i>Quercus stellata, Quercus marilandica</i>, and <i>Quercus falcata</i>. A woody understory is generally absent; when present it is sometimes variable, consisting of shrubs and small trees. The herbaceous layer is dominated by grasses (<i>Schizachyrium scoparium, Sorghastrum nutans</i>) with forbs common. <i>Lithospermum caroliniense</i> is characteristic of this type in Missouri. <i>Callirhoe triangulata</i> is found in both Missouri and Indiana. <i>Gymnopogon ambiguus, Anemone caroliniana, Penstemon tubiflorus, Heterotheca villosa var. villosa, Commelina erecta var. angustifolia, Carya texana, Carya pallida, Androsace occidentalis, Sabatia campanulata</i>, and <i>Conyza canadensis var. pusilla</i> are described as characteristic species in Indiana. Mosses are often present.
Comm #12316	Nyssa aquatica Forest » more details accession code: VB.CC.36021.CEGL002419	Southeastern Ecology Working Gro...	0	This semipermanently flooded water tupelo swamp forest is found in the Coastal Plain from Virginia south to Florida, west to Texas, and north in the Mississippi delta region to Missouri, Illinois, and Kentucky. Stands occur on permanently saturated soils on low, wet flats and sloughs, swales and backswamps, and the association is more common on floodplains of brownwater, rather than blackwater, rivers. Both organic and mineral soils may be present. The vegetation is dominated by dense, and occasionally pure, stands of <i>Nyssa aquatica</i> but often in association with <i>Taxodium distichum</i> (never very abundant in this type), <i>Liquidambar styraciflua, Planera aquatica, Nyssa biflora, Gleditsia aquatica, Fraxinus profunda</i>, and <i>Cephalanthus occidentalis</i>. The herbaceous layer is conspicuously sparse, and density is wholly dependent upon the extent and duration of flooding. Where water is permanent, herbaceous plants rely on substrates found on rotting logs, stumps, terraces, and buttresses of trees. Subcanopy density and forest tree recruitment are poor due to fluctuating water levels.
Comm #12317	CEGL001152 » more details accession code: VB.CC.3751.CEGL001152 NOT CURRENTLY ACCEPTED	EcoArt 2002	0
Comm #12318	Nassella lepida Herbaceous Vegetation » more details accession code: VB.CC.33465.CEGL003110	Western Ecology Working Group of...	0	These grasslands are moderately widespread in California and occur across such a variety of environmental param that few generalities can be made. Sites range from sea level to 1700 m in elevation, and include all topographic locations. Climate is Mediterranean with mean annual precipitation ranging from about 12 cm in the southwestern San Joaquin Valley to 200 cm in the montane of northwestern California. Soils are often deep clays derived from sandstone or ultramafic substrates. They are moist to saturated in the winter, but are always dry during the summer. Stands have a medium-tall graminoid layer from 0.5-1 m in height that is dominated by the perennial, tussock-forming bunchgrass <i>Nassella lepida</i>. In some stands, this is the only perennial grass. Other perennial grasses that may be common include <i>Festuca californica, Melica californica, Poa secunda, Nassella pulchra, Nassella cernua</i>, and <i>Calamagrostis koelerioides</i>. Cover of the bunchgrasses is described as typically low, but quantitative information is not available. Emergent shrubs and trees may be present. Stands that occur on ultramafic parent materials will have additional, serpentine-adapted species.
Comm #12319	Kobresia simpliciuscula - Trichophorum pumilum Saturated Herbaceous Vegetation » more details accession code: VB.CC.25900.KOBRESIASIMPLIC	Western Ecology Working Group of...	0	This plant association is found in extreme rich fens in the high altitude park of South Park in Colorado. This association is found at elevations of 2730-3060 m. (8960-10,040 feet). Extreme rich fens are small-patch communities confined to specific environments defined by ground water discharge, soil chemistry, and peat accumulation of at least 40 cm. Fens form at low points in the landscape at or near slopes where ground water intercepts the soil surface. The water chemistry is distinct in that it contains high levels of calcium and magnesium. The association is characterized by the presence of Kobresia simpliciuscula (25-60% cover) and Trichophorum pumilum (= Scirpus pumilus) (7-30% cover) on hummocks in the wetter end of the hydrologic gradient of the fen. Trichophorum pumilum does not occur as consistently as Kobresia simpliciuscula and is often inconspicuous within the plant association stand. Other plants (with %cover) that occur on the hummocks include Thalictrum alpinum (10-60%), Kobresia myosuroides (10%), Juncus arcticus (5-10%), and Salix candida (5%). The swales beneath the hummocks contain stands of Carex aquatilis, Carex simulata, Eleocharis quinqueflora, and Triglochin sp. The extreme rich fens also support a number of rare plants and insects, including regional endemics.
Comm #12320	Taxodium distichum - (Nyssa aquatica) / Forestiera acuminata - Planera aquatica Forest » more details accession code: VB.CC.35088.CEGL002421	Southeastern Ecology Working Gro...	0	This type represents bald-cypress - water tupelo swamp forests found in the Mississippi River Alluvial Plain and adjacent areas of the Gulf Coastal Plain of the southern United States, apparently extending northeast to the Interior Low Plateau. Stands are characterized by the presence of shallow standing water all or most of the year. The vegetation contains mixed dominants of <i>Taxodium distichum</i> and <i>Nyssa aquatica</i>. <i>Taxodium</i> is often emergent in the overstory above shorter individuals of <i>Nyssa aquatica</i>. In some instances <i>Carya aquatica</i> and (rarely) <i>Quercus lyrata</i> may also be present. Dominant trees exhibit tall, straight growth and swelled buttresses. The subcanopy is sparse, consisting primarily of <i>Forestiera acuminata, Cephalanthus occidentalis</i>, and <i>Planera aquatica</i>. Shrubs may include <i>Cephalanthus occidentalis</i> and <i>Itea virginica</i> with a variety of other species, such as <i>Acer rubrum var. drummondii, Acer negundo, Cornus obliqua (= Cornus amomum ssp. obliqua), Fraxinus pennsylvanica, Ilex decidua</i>, and <i>Liquidambar styraciflua</i>, mostly occurring around the slough margins. Woody vines are uncommon but may include <i>Ampelopsis arborea</i> and <i>Berchemia scandens</i>. The herbaceous layer is also very sparse, being restricted to rotting logs, buttresses of trees, and small mounds and ridges which remain dry most of the growing season.