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Add/Drop	Name	Reference	Plots↓	Description
Comm #11141	Abies magnifica - Pinus contorta var. murrayana / Hieracium albiflorum Forest » more details accession code: VB.CC.33357.CEGL008612	Western Ecology Working Group of...	0	This forest association occurs throughout the central and southern Sierra Nevada in California at all elevations of the upper montane, from 2380 to 2900 m (7800-9500 feet). Aspects are variable, but mostly northeast and northwest. Slopes are gentle or moderate. Stands are typically on benches, lower slopes, and in bottom positions adjacent to and somewhat upslope from flat areas such as meadow complexes or drainage bottoms. Stands in this type have significantly less bare ground and surface gravel as compared to most others in the upper montane of the Sierra Nevada. Microrelief is usually smooth and uniform to gently undulating. Stands of this association are dense, multi-layered forests with understories composed of patches of dense conifer regeneration. Average tree cover is one of the highest in the forests of the upper montane of the Sierra Nevada. The overstory is dominated by <i>Abies magnifica</i> in a mix with <i>Pinus contorta var. murrayana</i>. Understories are sparse; shrub cover is among the lowest in the upper montane forests, and shrubs occur in isolated patches or as scattered individuals. The herb layer usually has a mix of mesic and moist-site indicators, such as <i>Hieracium albiflorum, Viola purpurea, Kelloggia galioides, Osmorhiza berteroi (= Osmorhiza chilensis)</i>, and <i>Poa bolanderi</i>.
Comm #11142	Abies magnifica - Pinus monticola - Pinus contorta var. murrayana Forest » more details accession code: VB.CC.33356.CEGL008616	Western Ecology Working Group of...	0	These forests are found in the upper-elevation eastside and westside of the central and southern Sierra Nevada, California, typically above 2590 m in elevation. This is the highest elevation association of the mixed <i>Abies magnifica</i> and <i>Pinus monticola</i> associations. Aspects are varied, but are predominantly northeast and northwest. Sites are mostly on ridges and upper and middle slope positions. Soils are predominantly derived from granite, and may form on bedrock or alluvium or glacial till. They are typically shallow sands or sandy loams, and well-drained or excessively drained. There is much exposed gravel at the surface. Stands are moderately dense forests with sparse understories. Total vegetation cover is generally lower than other forests in the <i>Abies magnifica</i> alliance. Overstory composition is characterized by a mix of <i>Pinus monticola, Pinus contorta var. murrayana</i>, and <i>Abies magnifica</i>. Tree cover averages about 63% (range 37-91%). Shrub cover is virtually nonexistent, averaging 1% (no characteristic species), although conifer regeneration is moderate to high. The herb layer averages about 12% cover and includes <i>Arabis platysperma, Carex rossii, Pedicularis semibarbata</i>, and <i>Achnatherum occidentale</i> as the principal species.
Comm #11143	Quercus douglasii / Ceanothus cuneatus / Poaceae Woodland » more details accession code: VB.CC.31139.CEGL008646	Western Ecology Working Group of...	0	This association occurs in the foothills and Sierra Nevada from Butte to Fresno counties, and in the Central Coast in Monterey and San Benito counties, California. Stands of this forest are found at low elevations (90-1160 m [300-3800 feet]) on all aspects of slopes that are moderately steep to very steep (25-63%). Soils are rocky and gravelly sandy loams from granitic soils (basalts and shales). Stands of this forest are dominated by <i>Quercus douglasii</i> in the overstory, <i>Ceanothus cuneatus</i> in the understory shrub layer, and species of Poaceae in the understory herbaceous layer. <i>Pinus sabiniana</i> and <i>Quercus wislizeni</i> are usually found in this association. <i>Aesculus californica</i> is occasionally present. Other species present may include <i>Rhamnus crocea, Toxicodendron diversilobum</i>, and <i>Arctostaphylos viscida</i>.
Comm #11144	Quercus nigra - Quercus geminata / Lyonia ferruginea - Serenoa repens Forest » more details accession code: VB.CC.34959.CEGL003665	Southeastern Ecology Working Gro...	0	This type includes evergreen oak hammocks of Florida Panhandle riverbanks that are dominated by <i>Quercus nigra, Quercus geminata, Lyonia ferruginea</i>, and <i>Symplocos tinctoria</i> in the canopy and tall-shrub strata. <i>Serenoa repens</i> is the dominant low shrub.
Comm #11145	Quercus kelloggii / Arctostaphylos mewukka - Chamaebatia foliolosa Forest » more details accession code: VB.CC.32649.CEGL008619	Western Ecology Working Group of...	0	This forest association is currently only known from Yosemite National Park in California, and the following description is based on occurrences there. Additional information will be added as it becomes available. Stands of this forest are found at low elevations (1160-1370 m [3800-4500 feet]) on the upper portions of southeast- to west-facing, moderately steep to somewhat steep (6-25°) slopes of canyons and ridges. Landform is variable; sites are located on linear, convex and undulating slopes, ridges, and canyons. Soil textures range from loamy sand to silt loam and of granitic parent material. Soils are moderately well-drained to well-drained. Litter is high with 75-80% cover. Stands of this forest form a three-story structure. The open to intermittent tree layer is dominated by <i>Quercus kelloggii</i>. <i>Calocedrus decurrens, Pinus ponderosa</i>, and <i>Pinus attenuata</i> are sometimes found contributing minor cover in the tree layer. <i>Chamaebatia foliolosa</i> and <i>Arctostaphylos mewukka</i> are dominant in the open to intermittent shrub layer. <i>Arctostaphylos viscida</i> is often present. <i>Adenostoma fasciculatum</i> is occasionally found in this association as well. <i>Galium bolanderi</i> and moss are usually found in the open to intermittent herb layer. A large variety of other species are also found in this association, contributing little cover in the understory, including <i>Agoseris grandiflora, Poa secunda, Toxicodendron diversilobum, Lathyrus sulphureus, Vulpia microstachys, Ceanothus integerrimus, Ceanothus cuneatus</i>, and <i>Comandra umbellata ssp. californica</i>.
Comm #11146	Morella cerifera - Ilex cassine - Quercus virginiana - Serenoa repens Shrubland » more details accession code: VB.CC.35868.CEGL003788	Southeastern Ecology Working Gro...	0	Dense shrublands dominated by a variable mix of species, usually on the periphery of or associated with upland tropical or oak hammocks resulting from fire. Stands are dominated and characterized by <i>Morella cerifera (= Myrica cerifera)</i> and <i>Ilex cassine</i>. They may also typically contain <i>Quercus virginiana</i> and <i>Serenoa repens</i>. Other characteristic species include <i>Chrysobalanus icaco, Persea borbonia, Sabal palmetto, Trema micranthum</i>, and <i>Baccharis glomeruliflora</i>.
Comm #11147	Pinus monticola / Achnatherum occidentale Woodland » more details accession code: VB.CC.32811.CEGL008622	Western Ecology Working Group of...	0	This forest association is currently only known from Yosemite National Park in California, and the following description is based on occurrences there. Additional information will be added as it becomes available. In Yosemite and environs, this association occurs between 2350 to 3080 m (7700-10,100 feet) in elevation, primarily on somewhat gentle to moderate slopes, often near or partially on the tops of ridges. Aspects are northwest, west, southwest, and south. Soils are derived from granite. Textures are sand or sandy loam. Large rock/boulder cover may reach 27% of the stand, but bare soil also may reach 75%. Sites are upland. This association consists of an open tree canopy dominated by <i>Pinus monticola</i>, which averages 15% cover. <i>Abies magnifica</i> and <i>Pinus contorta var. murrayana</i> may also be present but in small numbers. The shrub layer is essentially nonexistent. The herb layer averages 10% cover, with the most frequent species being <i>Elymus elymoides</i> and <i>Achnatherum occidentale</i>. Other herb species that may be present include <i>Arabis platysperma</i> and <i>Eriogonum incanum</i>.
Comm #11148	Strumpfia maritima Florida Keys Shrubland » more details accession code: VB.CC.35122.CEGL003794	Southeastern Ecology Working Gro...	0	Relatively open ecotone, dominated by <i>Strumpfia maritima</i>, occurring on bare limestone between tidal communities and dense upland rockland hammock communities in the Florida Keys. Additional information is needed.
Comm #11149	Populus tremuloides / Amelanchier alnifolia - Symphoricarpos oreophilus / Tall Forbs Forest » more details accession code: VB.CC.32802.CEGL000568	Western Ecology Working Group of...	0
Comm #11150	Pinus jeffreyi / Chrysolepis sempervirens Woodland » more details accession code: VB.CC.33055.CEGL008625	Western Ecology Working Group of...	0	This woodland association is currently only known from Yosemite National Park and Inyo National Forest in California, and the following description is based on occurrences there. Additional information will be added as it becomes available. Stands of this woodland are found at mid to high elevations (2100-2900 m [6900-9500 feet]) on gentle to somewhat steep (3-22°) slopes with variable aspects ranging from northeast to south. Soils are poorly developed to moderately well-developed with textures ranging from gravelly sandy rock to silt loam. These soils are shallow to deep and are usually well-drained. Parent material is granitic. Stands of this woodland are dominated by <i>Pinus jeffreyi</i> in the open to intermittent tree canopy and <i>Chrysolepis sempervirens</i> in the open to intermittent understory shrub layer. The tree canopy may occasionally include <i>Abies concolor, Abies magnifica, Pinus lambertiana</i>, and <i>Juniperus occidentalis var. australis</i>. Understory species contribute to minor cover and may include <i>Achnatherum webberi, Apocynum androsaemifolium, Quercus vacciniifolia, Arctostaphylos patula, Cistanthe monosperma, Cryptantha muricata (= var. denticulata), Eriogonum spergulinum var. reddingianum, Hydrophyllum occidentale, Lupinus confertus, Maianthemum racemosum ssp. racemosum, Pseudostellaria jamesiana, Pyrola picta, Rumex acetosella, Streptanthus tortuosus</i>, and <i>Symphoricarpos rotundifolius var. rotundifolius</i>.