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Add/Drop	Name	Reference	Plots↓	Description
Comm #10281	Pinus ponderosa / Symphoricarpos oreophilus Forest » more details accession code: VB.CC.18176.PINUSPONDEROSAS	Western Ecology Working Group of...	0	This plant association is described for sites within the Seven Devils and western Boise mountains in Idaho, the Aquarius Plateau and Abajo Mountains in Utah, and Oregon. The association occurs with minor to local abundance in the two biophysical regions. In the northern portion of the range the association occurs on south-facing ridgetop and upper-slope positions at approximately 1525 m (5000 feet) elevation. In the south, the association occurs on gentle to moderate, south- to west-facing slopes in mid-slope positions at elevations ranging from 2400-2680 m (7900-8800 feet). Pseudotsuga menziesii forests are adjacent on less severe sites. Stands are characterized by an open to closed overstory dominated by Pinus ponderosa. Symphoricarpos oreophilus, Purshia tridentata, and Amelanchier alnifolia are common associates of the conspicuous understory shrub layer.
Comm #10282	Lesquerella (gordonii, ovalifolia) Herbaceous Alliance » more details accession code: VB.CC.23987.LESQUERELLAGORD	Southeastern Ecology Working Gro...	0	This alliance occurs on thin soil of rock outcrops; it is localized in central and western Oklahoma and in the Oklahoma Panhandle (and possibly adjacent Texas). Stands are dominated by members of the genus Lesquerella, including Lesquerella gordonii and Lesquerella ovalifolia. Some associates include Bouteloua curtipendula, Bouteloua hirsuta, Croton monanthogynus, Mentzelia oligosperma, Oenothera macrocarpa (= Oenothera missouriensis), and Opuntia humifusa.
Comm #10283	Schizachyrium scoparium - Sorghastrum nutans - Echinacea pallida - Dalea purpurea Herbaceous Vegetation » more details accession code: VB.CC.35453.CEGL007769	Southeastern Ecology Working Gro...	0	This dry-mesic blackland prairie community type occurs in the Upper West Gulf Coastal Plain of Arkansas. Vegetation is typically tall (4-6 feet) and dense; bare soil is not present. Eroded areas with dry prairie are extant and succeed to dry-mesic prairie. This community becomes shrubby with fire suppression. Fuel accumulation is rapid (complete burn after one growing season). Dominant species include <i>Schizachyrium scoparium, Sorghastrum nutans, Echinacea pallida</i>, and <i>Dalea purpurea</i>. Other herbaceous species include <i>Acacia angustissima, Andropogon virginicus, Centrosema virginianum, Chamaecrista fasciculata, Desmanthus illinoensis, Eryngium yuccifolium, Euphorbia corollata, Eupatorium altissimum, Liatris aspera, Liatris squarrosa, Rhynchosia latifolia, Rudbeckia hirta, Ruellia humilis, Salvia lyrata, Mimosa nuttallii (= Schrankia nuttallii), Silphium laciniatum, Oligoneuron rigidum, Sporobolus compositus (= Sporobolus asper), Tragia urticifolia, Tridens flavus, Vernonia baldwinii</i>, and <i>Vernonia missurica</i>. The non-natives <i>Lespedeza cuneata</i>, and <i>Melilotus officinalis</i> can be abundant in disturbed areas. Woody species, including <i>Sideroxylon lanuginosum (= Bumelia lanuginosa), Berchemia scandens, Cercis canadensis var. canadensis, Cornus florida, Diospyros virginiana, Fraxinus americana, Juniperus virginiana var. virginiana, Quercus muehlenbergii</i> (infrequently as very low density 'savanna' community), <i>Rhus glabra, Smilax bona-nox</i>, and <i>Smilax rotundifolia</i>, occur locally during periods of fire suppression. High-quality examples of this community type exist at the Terre Noire Natural Area. Additional large high quality examples are located on the Keadle, Wood, Brewer, McElhannon, and Deltic Land and Timber tracts. The type location is in Clark County, Arkansas. Other examples can be found in Hempstead, Howard, Little River, Nevada, and Sevier counties, Arkansas.
Comm #10284	A.851 » more details accession code: VB.CC.2480.A851 NOT CURRENTLY ACCEPTED	EcoArt 2002	0	The bulk of the distribution of this alliance in the United States is west of Texas, in New Mexico, Arizona, Nevada, and California. Stands found in southeastern to western Texas are on low-elevation flats below 1050 m (3500 feet). These shrublands are dominated by ~Larrea tridentata$. Associated species in Texas can include ~Parthenium incanum, Atriplex canescens, Flourensia cernua, Agave lechuguilla, Bouteloua eriopoda, Bouteloua ramosa, Euphorbia antisyphilitica, Dasyochloa pulchella (= Erioneuron pulchellum), Flourensia cernua, Hechtia texensis, Jatropha dioica var. graminea, Opuntia schottii, Prosopis glandulosa, Tiquilia greggii$, and ~Acacia$ spp. This alliance is also a widespread disturbance type that has spread into former desert grasslands and mixed shrublands.
Comm #10285	CEGL002446 » more details accession code: VB.CC.4887.CEGL002446 NOT CURRENTLY ACCEPTED	EcoArt 2002	0
Comm #10286	Quercus pagoda - Quercus michauxii - Carya (glabra, ovata) / Carpinus caroliniana / Smilax bona-nox / Carex complanata Mesic Floodplain Forest » more details accession code: VB.CC.35419.CEGL007981 NOT CURRENTLY ACCEPTED	Southeastern Ecology Working Gro...	0	This subhydric forest community is located on the higher elevations of floodplains located on the Upper West Gulf Coastal Plain of southern Arkansas. The canopy is tall (over 30 m [100 feet]) and nearly closed but ragged with small (0.5-2.0 acres) gaps under old-growth conditions. Younger stands typically exhibit a denser and more closed canopy. The canopy often has multiple layers with large emergent trees, usually <i>Quercus pagoda</i>. This forest community is infrequently flooded and drains rapidly. Dominant tree species include <i>Quercus pagoda, Quercus michauxii, Liquidambar styraciflua</i> (common), and <i>Nyssa sylvatica</i> with <i>Acer rubrum var. rubrum, Carya glabra, Carya ovata, Diospyros virginiana, Ilex opaca, Morus rubra, Pinus taeda, Quercus alba</i>, and <i>Ulmus americana</i> occurring as occasionals. Based on the number of stumps, historically, <i>Pinus taeda</i> was a common component of this community. <i>Carpinus caroliniana</i> is the dominant understory tree. Other understory trees include <i>Hamamelis virginiana, Ilex opaca, Sassafras albidum</i>, and <i>Ulmus alata</i>. The dominant shrub is <i>Symplocos tinctoria</i> with <i>Callicarpa americana, Hamamelis virginiana, Vaccinium fuscatum</i>, and <i>Vaccinium virgatum</i>. Scattered stands of <i>Arundinaria gigantea</i> are found throughout this community. Seedlings of <i>Quercus nigra</i> and <i>Quercus phellos</i> are common, but few saplings or trees are extant. Common woody vines include <i>Berchemia scandens, Parthenocissus quinquefolia, Smilax bona-nox, Toxicodendron radicans</i>, and <i>Vitis rotundifolia</i>. <i>Chasmanthium sessiliflorum</i> occurs as the dominant herb. Other herbaceous species include <i>Ampelopsis arborea, Amphicarpaea bracteata, Symphyotrichum lanceolatum (= Aster lanceolatus), Bignonia capreolata, Campsis radicans, Carex complanata, Carex debilis, Carex glaucodea, Helenium flexuosum, Trachelospermum difforme</i>, and <i>Viola sororia</i>. The herbaceous layer can be sparse under low light conditions. The ground cover is mostly oak leaf litter. These forests occur on relatively poorly drained, nearly level, acidic soils comprised of fine sands and silt. These forest communities typically have Mima Mounds interspersed and grade into <i>Quercus nigra - Quercus phellos - Liquidambar styraciflua / Ilex opaca / Vaccinium fuscatum / Smilax smallii / Galium obtusum ssp. obtusum - Carex debilis</i> Temporarily Saturated Overflow Bottom Forest. This forest community could be subject to late summer and fall wildfires during dry conditions. Fuel build-up is generally not high. However, the <i>Pinus taeda</i> component that was extant historically could have made this community more flammable. Under current management practices the <i>Pinus taeda</i> component is much reduced. High-quality examples are known from Moro Bottoms Natural Area, Overflow National Wildlife Refuge, and Pine Bluff Arsenal Old Growth Area. Other examples are known from Big Cypress Unique Area, Lorance Creek Natural Area, and Pond Creek National Wildlife Refuge. The type location is in Dallas County, Arkansas. This community is also known from Ashley, Cleveland, Jefferson, Saline, and Sevier counties, Arkansas. It is likely extant throughout the Ouachita River Watershed.
Comm #10287	Populus deltoides / Muhlenbergia asperifolia Forest » more details accession code: VB.CC.27398.POPULUSDELTOIDE	Western Ecology Working Group of...	0	This is a lowland forested riparian association known from the Rio Grande and Pecos drainages of central New Mexico and the Arkansas River in southeastern Colorado. This association occurs in lowland river valleys at elevations ranging from 1180-1680 m (3850-5500 feet). Typical sites are mid- to upper-elevation bars and terraces within the active floodplain. Soils are young, weakly developed Entisols. This association is often dominated by older, open stands of Populus deltoides ssp. wislizeni or Populus deltoides ssp. monilifera with grassy understories dominated by Muhlenbergia asperifolia (the characteristic herbaceous species) and Distichlis spicata (up to 80% total herbaceous cover). Salix amygdaloides is present in the tree canopies of some stands. Shrubs are few and scattered, although invasive and exotic Tamarix spp. and Elaeagnus angustifolia are often abundant. Other herbaceous species may include Scirpus microcarpus, Panicum virgatum, and Eleocharis palustris. A few weedy forbs include Apocynum cannabinum and Ambrosia artemisiifolia.
Comm #10288	Abies lasiocarpa - (Pinus contorta) / Lupinus arcticus ssp. subalpinus Woodland » more details accession code: VB.CC.26380.ABIESLASIOCARPA	Western Ecology Working Group of...	0	This association occurs only in the northeastern Olympic Mountains of Washington. Sites occupied are dry, upper slopes and ridgetops on southwestern aspects between 1500 and 1850 m elevation in the driest rainshadow of the Olympic Mountains. This is a needle-leaved evergreen conifer woodland of relatively short stature. Abies lasiocarpa is always present and usually codominant or dominant (mean cover 22%). Pinus contorta is often dominant or codominant but can be completely absent (mean cover 42%). Pseudotsuga menziesii occurs about half the time and averages 20% cover when present. The understory is dominated by the forb Lupinus arcticus ssp. subalpinus (mean cover 15%), and occasionally codominated by Arnica cordifolia or the dwarf-shrub Juniperus communis. Other frequent understory species that occur in low abundance are Paxistima myrsinites, Lomatium martindalei, Orthilia secunda, Hieracium albiflorum, and Valeriana sitchensis. This association is distinguished from similar associations by >3% cover of Lupinus arcticus ssp. subalpinus and presence of Abies lasiocarpa, along with little to no Abies amabilis, Tsuga heterophylla, Tsuga mertensiana, Rhododendron albiflorum (<10%), Vaccinium membranaceum (<5%), Valeriana sitchensis, or Luzula glabrata var. hitchcockii (<3%).
Comm #10289	Rhynchospora filifolia - Juncus abortivus Herbaceous Vegetation » more details accession code: VB.CC.35267.CEGL004131	Southeastern Ecology Working Gro...	0	This association occupies lower margins of limesinks and other Coastal Plain ponds. Stands are dominated by <i>Rhynchospora filifolia</i> and <i>Juncus abortivus</i>. Other characteristic species include <i>Rhynchospora pleiantha, Eleocharis tricostata, Centella erecta, Rhynchospora nitens</i>, and <i>Juncus repens</i>.
Comm #10290	Sambucus mexicana Intermittently Flooded Shrubland Alliance » more details accession code: VB.CC.23513.SAMBUCUSMEXICAN	Western Ecology Working Group of...	0	Stands of these central and southern California shrublands grow on intermittently flooded sites between sea level and 300 m elevation. Water chemistry is fresh. Summers are warm and dry, and the bulk of yearly precipitation falls between November and May. Average yearly rainfall totals between 60 and 120 cm. Winters are mild; freezes are rare. This alliance is dominated by Sambucus mexicana. Other shrubs present may include Vitis californica, Salix exigua, and Toxicodendron diversilobum. Emergent trees may be present and could include Populus fremontii, Fraxinus latifolia, and Quercus lobata. The herbaceous layer is dominated by graminoids.