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Add/Drop	Name	Reference	Plots↓	Description
Comm #5271	Pinus washoensis Woodland Alliance » more details accession code: VB.CC.21791.PINUSWASHOENSIS	Western Ecology Working Group of...	0	This montane and subalpine woodland alliance occurs between 2100 and 2850 m elevation on a few widely scattered areas in the mountains of northern California. It can occur on all slopes, but is most extensive on upper slopes. This alliance requires moderately high annual precipitation, of which a significant portion must fall as snow. The summers are distinctly dry. Substrates in the northern portion of the range are volcanic, grading to granitic in the southern portion. Pinus washoensis is the sole or dominant tree in the canopy of this montane and subalpine California woodland. Pinus contorta var. murrayana, Pinus jeffreyi, Pinus ponderosa, Abies magnifica, Pinus monticola, and Abies concolor may also be present. Shrubs are very sparse, but may include Pseudostellaria jamesiana and/or Lupinus caudatus. The herbaceous layer is dominated by graminoids.
Comm #5272	Panicum bulbosum - Lycurus phleoides Herbaceous Vegetation » more details accession code: VB.CC.23642.PANICUMBULBOSUM	Western Ecology Working Group of...	0
Comm #5273	Thuja occidentalis Wooded Herbaceous Alliance » more details accession code: VB.CC.22311.THUJAOCCIDENTAL	Midwestern Ecology Working Group...	0
Comm #5274	Carex albonigra - Myosotis asiatica Herbaceous Vegetation » more details accession code: VB.CC.32190.CEGL005863	Western Ecology Working Group of...	0	This fell-field association has been sampled in the alpine of Glacier National Park, Montana, and Waterton Lakes National Park, Alberta. It is predominantly a small- (to large-) patch fell-field community, characteristic and extensive at the highest elevations and most extreme and exposed alpine environments; its recorded elevation range is from 2060 to 2630 m (6755-8625 feet), though most of the sites are above 2400 m (7870 feet). It usually is dispersed across expansive rolling upland and frost rubble-mantled summits; topographic positions include flat mountain summits, ridges, exposed upper slopes and rolling uplands. Because of high elevations and exceedingly exposed positions, this is one of the most wind-impacted environments (prevailing winds being from the southwest); xeric conditions are in effect through most of the year. Being swept free of snow and protective cover facilitates frost action, which results in patterned ground features with the polygonal arrangement of rocks. The ground surface is dominated by exposed rock, mostly in excess of 60% cover, with undeveloped and well-drained soils restricted to pockets and vegetation-covered patches. The modal aspect is a very low-growing turf, scattered in small patches across an undulating landscape. The vascular plant cover is highly variable, from 1% to approaching 60%, with most of the sampled occurrences having less than 30% cover; there is not one species or species group that can be considered strictly characteristic. <i>Dasiphora fruticosa ssp. floribunda</i> is the only dwarf-shrub of note with cover usually less than 5%; for its cover to exceed 10% would be indicative of a different community. The most diagnostic graminoids are <i>Carex albonigra</i> and <i>Carex rupestris</i> with <i>Carex nardina</i> occurring sporadically; their single or combined cover seldom exceeds 5%. <i>Festuca brachyphylla, Trisetum spicatum, Luzula spicata, Poa alpina</i>, and <i>Poa glauca</i> also exhibit high constancy and low cover, and <i>Calamagrostis purpurascens</i> is present in the lower elevation examples of the type. The distinctive cushion plant <i>Silene acaulis</i> attains its greatest constancy and cover in this type, often constituting the dominant forb. Four forbs, <i>Myosotis asiatica (= Myosotis alpestris), Potentilla nivea, Rhodiola rosea (= Sedum roseum)</i>, and <i>Minuartia rossii (= Arenaria rossii)</i>, are more consistently present in this than other types. Other high-constancy forbs include <i>Minuartia obtusiloba (= Arenaria obtusiloba), Smelowskia calycina, Sedum lanceolatum, Erigeron compositus, Oxytropis campestris</i>, and <i>Selaginella densa var. standleyi (= Selaginella standleyi)</i>.
Comm #5275	Carex geyeri Herbaceous Vegetation » more details accession code: VB.CC.32189.CEGL005864	Western Ecology Working Group of...	0	This small-patch vegetation type is found at lower alpine and mid to upper subalpine zones from 1770 to 2301 m (5800-7550 feet) elevation in Glacier National Park, Montana, and Grand Teton National Park in Wyoming. It occurs on gentle to steep slopes (1-65%) having predominantly southerly exposures. It is often found on gully slopes where streambeds are deeply incised in colluvium, resulting in unstable surfaces. In winter these gullies can fill with snow, which persists long into the growing season, assuring ample soil moisture well into August. Though the vegetation pattern can be regular, these sites are most often heterogeneous with patches of vegetation interspersed with bare gravel, scattered talus, as well as exposed bedrock. Because of persistent sheet erosion, soil development is restricted to the clumps or patches of grass and sedge. Vascular plant cover ranges from around 10% on the rockiest of southerly exposures to over 75% where soil is more extensive and litter mantles the surface. Shrubs may be absent or may include scattered individuals of <i>Spiraea betulifolia, Mahonia repens, Artemisia tridentata ssp. spiciformis, Amelanchier alnifolia, Symphoricarpos oreophilus</i>, and <i>Rubus parviflorus</i>, none with more than 5% cover. The diverse graminoid component is dominated by <i>Carex geyeri</i>; other common species include <i>Poa cusickii, Pseudoroegneria spicata, Elymus elymoides, Koeleria macrantha</i>, and <i>Festuca idahoensis</i>. The forb component is also diverse but often has low cover. In Glacier National Park, the forbs grow in tall clumps dominated by <i>Hieracium cynoglossoides (= Hieracium albertinum), Senecio megacephalus, Arnica rydbergii, Lomatium dissectum, Aquilegia flavescens, Potentilla diversifolia, Cirsium hookerianum</i>, and <i>Symphyotrichum foliaceum (= Aster foliaceus)</i>. Shorter and less conspicuous, but occurring with as much cover and constancy, are <i>Arenaria capillaris, Eriogonum flavum, Galium boreale, Antennaria rosea, Sedum stenopetalum</i>, and <i>Campanula rotundifolia</i>. In Grand Teton National Park, <i>Balsamorhiza sagittata</i> and <i>Eriogonum umbellatum</i> are the only species that occur regularly with more than trace cover. Combined moss and lichen cover does not exceed 20% and usually is less than 5%.
Comm #5276	Pinus (virginiana, taeda) / Juniperus virginiana - Chionanthus virginicus - Ulmus alata Granitic Flatrock Border Forest » more details accession code: VB.CC.34768.CEGL003993	Southeastern Ecology Working Gro...	0	This granitic flatrock border woodland occurs on shallow soils over exfoliated granitic bedrock, on the margins of Piedmont Fall-line granite outcrops (some of which are actually found east of the fall-line in the Coastal Plain). Stands are generally associated with open granitic flatrock communities. Stands of this association are somewhat open forests or woodlands. The closure of stands may be variable, and many would fall below the 60% forest/woodland threshold, but this association is placed in a "forest" alliance. The canopy is typically dominated by <i>Pinus virginiana</i> or <i>Pinus taeda</i>. Other canopy species, which also may form an open understory, include <i>Juniperus virginiana, Ulmus alata, Carya glabra, Chionanthus virginicus</i>, and <i>Quercus stellata</i>. Frequent shrubs include <i>Vaccinium arboreum</i> and <i>Rhus copallina</i>. Other shrubs include <i>Vaccinium stamineum</i> and <i>Rhus aromatica</i>. Woody vines, especially <i>Vitis rotundifolia, Toxicodendron radicans, Smilax bona-nox</i>, and <i>Smilax rotundifolia</i>, are often abundant. Herb cover is generally low to moderate and usually includes only small amounts of the species of the open rock. Grasses, including <i>Schizachyrium scoparium, Piptochaetium avenaceum</i>, or <i>Danthonia spicata</i>, may be common. Xerophytic species such as <i>Opuntia humifusa var. humifusa</i> or <i>Yucca filamentosa</i> are often present, as are typical forest species such as <i>Chimaphila maculata</i> and <i>Asplenium platyneuron</i>. The understories of stands of this type may become invaded by the exotic species <i>Ligustrum sinense, Lonicera japonica, Microstegium vimineum</i>, or <i>Stellaria media</i>.
Comm #5277	Cymodocea filiformis Permanently Flooded - Tidal Herbaceous Alliance » more details accession code: VB.CC.26941.CYMODOCEAFILIFO	Southeastern Ecology Working Gro...	0	This seagrass alliance occurs at depths of 1-4 m in warm sea waters (salinity greater than 17 ppt), on a variety of substrate textures. Vegetation in this alliance can consist of monodominant Cymodocea filiformis (= Syringodium filiforme), or can have a mixture of Cymodocea filiformis with other seagrass species, including Thalassia testudinum, Halophila engelmannii, and Halodule beaudettei. These seagrass beds are often also associated with an abundance of macrophytic algae. This alliance ranges discontinuously from Florida to Mexico along the Gulf Coast of North America, throughout the Caribbean, and extends up the Atlantic coast of Florida as far north as the St. Johns River. In Texas, it occurs south of Aransas Bay, and is most abundant in the Laguna Madre and Corpus Christi Bay areas.
Comm #5278	CEGL004217 » more details accession code: VB.CC.5887.CEGL004217 NOT CURRENTLY ACCEPTED	EcoArt 2002	0
Comm #5279	Quercus lyrata - Quercus laurifolia - Taxodium distichum / Saururus cernuus Forest » more details accession code: VB.CC.26596.QUERCUSLYRATAQU	Southeastern Ecology Working Gro...	0	This vegetation of sloughs and edges of backswamps in the Atlantic Coastal Plain has a mixture of cypress - gum swamp and bottomland hardwoods species, generally Quercus lyrata, Quercus laurifolia, Taxodium distichum, Populus heterophylla, Fraxinus profunda, Quercus phellos, Ulmus americana, Acer rubrum, Liquidambar styraciflua, Carya aquatica, Planera aquatica, and Fraxinus pennsylvanica. Along with the canopy species, other species that may be present in the subcanopy are Ulmus alata, Ilex decidua, Carpinus caroliniana, and Diospyros virginiana. The shrub layer ranges from sparse to a moderate coverage by species of the canopy and subcanopy layers with Sabal minor and Arundinaria gigantea. Herbaceous coverage usually is well-developed, and dominant species include Carex joorii, Carex intumescens, Carex lupulina, Boehmeria cylindrica, Justicia ovata, Saururus cernuus, and Leersia lenticularis. Other herbaceous species that occur include Commelina virginica, Lobelia cardinalis, Ludwigia palustris, Diodia virginiana, Gratiola virginiana, and others. The undergrowth (especially the prevalence of Saururus cernuus) is typical of cypress - gum swamps. This forest has well-developed canopy, subcanopy, and herbaceous strata.
Comm #5280	Quercus prinus - Quercus stellata - (Pinus virginiana, Pinus echinata) / Vaccinium pallidum / Schizachyrium scoparium Woodland » more details accession code: VB.CC.35996.CEGL004910	Schafale, M. P. 2011. Classifica...	0	This community is an open xeric woodland occurring over thin soils over shallow bedrock but without substantial rock outcrop. <i>Quercus prinus (= Quercus montana), Quercus stellata, Pinus echinata</i>, and <i>Pinus virginiana</i> are the predominant trees, in varying proportions. Other trees may include <i>Juniperus virginiana, Quercus marilandica, Quercus alba</i>, and <i>Carya glabra</i>. The undergrowth may be dominated either by grasses or by short clonal shrubs such as <i>Vaccinium pallidum</i> or <i>Gaylussacia baccata</i>. Grassy areas are generally dominated by <i>Schizachyrium scoparium</i>, but may include <i>Danthonia spicata, Piptochaetium avenaceum, Andropogon gerardii, Andropogon ternarius, Andropogon gyrans</i>, and <i>Sorghastrum nutans</i>. A variety of forbs may also be present, including <i>Tephrosia virginiana, Pityopsis graminifolia, Pteridium aquilinum, Parthenium integrifolium, Cunila origanoides</i>, and <i>Coreopsis verticillata</i>.