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Add/Drop	Name	Reference	Plots↓	Description
Comm #7521	A.1911 » more details accession code: VB.CC.1612.A1911 NOT CURRENTLY ACCEPTED	EcoArt 2002	0	Forests in this alliance represent the drier end of the white oak - red oak - black oak cover type and are difficult to identify easily. This alliance is distributed in the Ozark Highlands, Ouachita Mountains, Arkansas Valley, the Interior Highlands, Piedmont, Inner Coastal Plain, and Blue Ridge. Stands are codominated by some combination of ~Quercus alba, Quercus coccinea, Quercus velutina$, and/or ~Quercus rubra$. In addition, ~Quercus stellata, Quercus prinus, Carya alba, Carya glabra, Carya ovata, Pinus virginiana$, and ~Pinus echinata$ are common associates. Other common associates can include ~Nyssa sylvatica, Acer rubrum var. rubrum, Sassafras albidum, Quercus falcata, Quercus macrocarpa$ (within its range), and ~Prunus serotina var. serotina$. Typical shrubs and small trees include ~Cornus florida, Corylus americana, Ostrya virginiana, Oxydendrum arboreum, Sassafras albidum, Kalmia latifolia, Rhododendron calendulaceum, Gaylussacia ursina, Vaccinium$ spp., ~Viburnum acerifolium$, and ~Hamamelis virginiana$. The herbaceous composition varies considerably over the wide range of this alliance. Some common herbs include ~Agrimonia rostellata, Amphicarpaea bracteata, Botrychium virginianum, Carex blanda, Danthonia spicata, Antennaria plantaginifolia, Desmodium nudiflorum, Thelypteris noveboracensis, Prenanthes altissima, Galium$ spp., ~Dioscorea villosa, Conopholis americana, Polygonatum biflorum, Medeola virginiana$, and ~Maianthemum racemosum$. Stands can be found on mid to upper slopes and terraces where dry-mesic conditions persist and where soils are more sandy and/or rocky. Bedrock is sandstone, siltstone, chert, or shale. Disturbance in the form of wind and logging tends to favor ~Quercus velutina$ in these forests. These forests generally occur on slopes and sheltered ridgetops. One example from the Interior Low Plateau of Tennessee occurs on high, ancient, elevated terraces adjacent to river floodplains.
Comm #7522	Trifolium nanum Herbaceous Vegetation » more details accession code: VB.CC.32126.CEGL005939	Western Ecology Working Group of...	0	This fell-field cushion plant association occurs among the patchwork of tundra associations in large areas of the high alpine in the southern Rocky Mountains. Stands generally occur on wind-exposed ridges and gentle to steep upper slopes (8-100%) with convex surface relief. Aspects are southwestern, western, northern and northeastern. These areas are snow-free and windswept by strong seasonal winds during the winter. The surficial geology is generally bedrock granite or other igneous or metamorphic rocks, but the community may occur on loose talus slopes. Sites are typically xeric and rocky, with the ground surface largely covered in large and small rocks and gravel. Soil types are shallow, poorly developed, well-drained or rapidly drained, cobbly or gravelly, sandy loam to sand. Mosses and lichens can also cover up to 20% of the stand. The vegetation is characterized by dense patches of matted tundra species interspersed with exposed rocks and cobbles. The moderately dense herbaceous layer (40-60% cover) is dominated by <i>Trifolium nanum</i> with 20-50% cover. <i>Paronychia pulvinata</i> or <i>Minuartia biflora (= Lidia biflora)</i> may codominate some stands. Several other species are consistently found within stands, some with relatively high cover such as <i>Geum rossii, Silene acaulis</i>, and <i>Tonestus pygmaeus</i>. Other constant forbs with lower cover include <i>Arenaria fendleri, Artemisia scopulorum, Castilleja occidentalis, Erigeron pinnatisectus, Eritrichium nanum, Minuartia obtusiloba, Polygonum bistortoides, Saxifraga bronchialis, Selaginella densa</i>, and <i>Trifolium dasyphyllum</i>. Graminoids are also present with low cover and commonly include <i>Carex rupestris var. drummondiana, Festuca brachyphylla, Luzula spicata, Poa alpina</i>, and <i>Poa glauca</i>. Diagnostic of this alpine fellfield is the dominance of <i>Trifolium nanum</i> with other cushion plants.
Comm #7523	Juniperus monosperma / Quercus turbinella Woodland » more details accession code: VB.CC.18738.JUNIPERUSMONOSP	Western Ecology Working Group of...	0
Comm #7524	Picea sitchensis - Populus balsamifera ssp. trichocarpa / Alnus viridis ssp. sinuata Woodland » more details accession code: VB.CC.37164.CEGL003277	Shephard, M. E. 1995. Plant comm...	0
Comm #7525	A.1171 » more details accession code: VB.CC.947.A1171 NOT CURRENTLY ACCEPTED	EcoArt 2002	0	This alliance includes tropical and subtropical freshwater marshes dominated by ~Schoenoplectus californicus (= Scirpus californicus)$.
Comm #7526	Baccharis emoryi / Muhlenbergia asperifolia Shrubland » more details accession code: VB.CC.32134.CEGL005990	Western Ecology Working Group of...	0
Comm #7527	Populus angustifolia - Acer negundo Woodland » more details accession code: VB.CC.32124.CEGL005992	Western Ecology Working Group of...	0
Comm #7528	Alnus oblongifolia - Salix gooddingii Forest » more details accession code: VB.CC.32092.CEGL005943	Western Ecology Working Group of...	0	This lower-montane riparian association is known from small mountain drainages in the Rio Grande basin of south-central New Mexico, but it likely extends westward into the upper reaches of the Gila River and Mimbres River watersheds and possibly into Arizona. Stands are known to occur on cobbly sidebars along lower-montane streams and overflow channels at elevations of around 1620 to 1650 m (5300-5400 feet), but they likely range to from 1500 to 2200 m. Flooding can be frequent to infrequent (two-year estimated recurrence interval), but the water table usually occurs within a meter of the surface. Although sites may be dry on the surface for several weeks, they usually retain some moisture at lower depths during at least part of the growing season (usually there is evidence in stands of water stains and flood debris, indicating frequent flooding, perhaps on a biannual basis).This community type has moderately closed canopies of <i>Alnus oblongifolia</i> at heights up to 18 m with a subcanopy of <i>Salix gooddingii</i>. <i>Fraxinus velutina</i> may be common as well, but other tree species are minor or accidental. The dense tree canopies tend to preclude significant undergrowth, although <i>Poa fendleriana</i> can be abundant. The shrub <i>Baccharis salicifolia</i> can be well-represented, and <i>Amorpha fruticosa</i> can also be common. The type can occur in an ecological complex with community types from the <i>Platanus wrightii</i> and <i>Juglans major</i> alliances.
Comm #7529	Alnus oblongifolia / Baccharis salicifolia Forest » more details accession code: VB.CC.32089.CEGL005944	Western Ecology Working Group of...	0	This association is found along Palomas Creek and probably elsewhere in the Black Range (Sierra County) and the mountains of southwestern New Mexico and southeastern Arizona. Stands are known to occur along moderate-gradient (1.0-1.5%), lower montane stream channels at around 1525 m (5000 feet) elevation. Flooding is probably frequent, at least within a five-year return interval. Soils are cobbly and have been identified as moist sandy-skeletal Aeric Fluvaquents. This type is characterized by young, open stands of <i>Alnus oblongifolia</i> poles and saplings, with abundant <i>Baccharis salicifolia</i> in the shrub layer. Young <i>Juglans major</i> may also occur. Among the forbs, <i>Apocynum cannabinum</i> is well-represented, and the vines <i>Vitis arizonica, Clematis ligusticifolia</i>, and introduced <i>Parthenocissus quinquefolia</i> are common to well-represented.
Comm #7530	Fagus grandifolia - Quercus (prinus, velutina) / Gaylussacia baccata Forest » more details accession code: VB.CC.31110.CEGL006920	Eastern Ecology Working Group of...	0	This mesic beech and mixed oak forest with an ericaceous understory is typically located on ravines and slopes of the Inner Coastal Plain of New Jersey and in the High Allegheny Plateau of Pennsylvania. Dominant trees include <i>Fagus grandifolia</i>, with <i>Quercus prinus</i> or <i>Quercus velutina</i>, and smaller amounts of <i>Quercus alba</i> and <i>Quercus coccinea</i>. A sparse shrub stratum (5-10% cover) is composed of scattered patches of <i>Fagus grandifolia, Gaylussacia baccata, Gaylussacia frondosa, Vaccinium pallidum</i>, and rarely <i>Kalmia latifolia</i>. There is very little herbaceous cover and leaf litter is the primary ground cover.