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Comm #7591	Pinus ponderosa / Ribes cereum Forest » more details accession code: VB.CC.33133.CEGL000199	Western Ecology Working Group of...	0	These montane evergreen stands are common on the eastern side of the Continental Divide in Rocky Mountain National Park between 2200 and 2840 m (7215-9300 feet) elevation. They often occur on the southern flank of lateral moraines and on other dry, south-facing slopes at pitches that are moderate to somewhat steep (10-49%). Soils are rapidly drained loamy sands derived from granitic parent material. Exposed bedrock, boulders, and small rocks can make up 10-25% of the ground surface within the stand, and another 25-75% of the ground is covered in long needle litter and duff. <i>Pinus ponderosa var. scopulorum</i> forms an open canopy within this association. Trees reach between 10 and 20 m in height with areal coverage of 20-40%. In addition to <i>Pinus ponderosa var. scopulorum</i>, scattered individuals of <i>Pseudotsuga menziesii</i> can contribute up to 10% cover, and <i>Pinus contorta var. latifolia, Pinus flexilis</i>, and <i>Juniperus scopulorum</i> can be found in low concentrations. The association is defined by a consistent yet inconspicuous shrub layer dominated by <i>Ribes cereum</i> that covers only 20% of the surface area within the stand. The shrubs generally grow between 0.5-1 m tall and are dispersed throughout the stand. Several other shrub species can occur, but all with <5% cover. These species include <i>Arctostaphylos uva-ursi, Ceanothus fendleri, Juniperus communis var. montana, Mahonia repens, Prunus virginiana var. melanocarpa, Purshia tridentata</i>, and <i>Rubus deliciosus</i>. Herbaceous cover within the association can be variable. Some stands have up to 50% cover of dry montane graminoids such as <i>Muhlenbergia montana</i> and <i>Carex rossii</i>; other stands have only 10% herbaceous cover with a heavy litter layer blanketing the understory. Common forbs, nearly always found in trace amounts, include <i>Antennaria</i> spp., <i>Artemisia ludoviciana, Draba</i> spp., <i>Eriogonum umbellatum var. umbellatum, Geranium caespitosum var. caespitosum, Potentilla fissa, Potentilla hippiana, Sedum lanceolatum ssp. lanceolatum</i>, and <i>Thermopsis divaricarpa</i>. The invasive grasses <i>Bromus tectorum</i> and <i>Poa pratensis</i> have also been found in trace amounts within stands of this association.
Comm #7592	Pinus ponderosa / Symphoricarpos albus Forest » more details accession code: VB.CC.36881.CEGL000203	Midwestern Ecology Working Group...	0	The overstory of this community is dominated by <i>Pinus ponderosa</i>. There are lesser amounts of <i>Populus tremuloides, Betula papyrifera, Quercus macrocarpa, Juniperus scopulorum, Picea glauca, Pinus flexilis</i>, and <i>Pseudotsuga menziesii</i> successfully reproducing. The shrub layer is prominent and approximately 0.5-1.0 m tall. The most prevalent shrubs are <i>Amelanchier alnifolia, Symphoricarpos albus, Shepherdia canadensis, Mahonia repens, Spiraea betulifolia, Juniperus communis</i>, and <i>Prunus virginiana</i>. The herbaceous layer is also well-developed. Typical species found in this layer are <i>Achillea millefolium, Campanula rotundifolia, Balsamorhiza sagittata, Galium</i> spp., and <i>Euthamia occidentalis (= Solidago occidentalis)</i>. This ponderosa pine community type occurs in the mountains of the northwestern United States, from the eastern Cascades and northern Sierra Nevada to the Rocky Mountains and Black Hills. It is found on moderate, undulating slopes with loamy soils. Most stands are on slopes with more northerly aspects. Surface fires are a regular occurrence but regeneration after these events is rapid.
Comm #7593	Pinus ponderosa / Symphoricarpos occidentalis Forest » more details accession code: VB.CC.33110.CEGL000204	Western Ecology Working Group of...	0	This forest type is an important association in the foothills and lower montane slopes of the Little Rocky Mountains of north-central Montana where it occurs on all aspects of the rounded foothills and on warm aspects of moderate mountain slopes. Elevations range from 1040-1585 m (3400-5200 feet). Soils are loams or sandy loams derived primarily from limestone. Stands have an open to closed canopy of <i>Pinus ponderosa</i>. <i>Symphoricarpos occidentalis, Amelanchier alnifolia</i>, and <i>Prunus virginiana</i> dominate the relatively dense shrub layer. The herbaceous layer is composed of the perennial bunchgrass <i>Pseudoroegneria spicata</i> with a sparse but diverse assemblage of forbs including <i>Anemone multifida</i> and <i>Balsamorhiza sagittata</i>. These warm dry pine forests benefit from periodic ground fire that reduces over-stocking by killing seedling- and sapling-sized trees and lessens the risk of stand replacing crown fires.
Comm #7594	Atriplex canescens - Ephedra viridis Shrubland » more details accession code: VB.CC.22276.ATRIPLEXCANESCE	Western Ecology Working Group of...	0
Comm #7595	A.427 » more details accession code: VB.CC.2091.A427 NOT CURRENTLY ACCEPTED	EcoArt 2002	0
Comm #7596	A.42 » more details accession code: VB.CC.2084.A42 NOT CURRENTLY ACCEPTED	EcoArt 2002	0
Comm #7597	Salix wolfii / Carex aquatilis Shrubland » more details accession code: VB.CC.25594.SALIXWOLFIICARE	Western Ecology Working Group of...	0
Comm #7598	Pinus ponderosa / Symphoricarpos oreophilus Forest » more details accession code: VB.CC.33109.CEGL000205	Western Ecology Working Group of...	0	This ponderosa pine forest occurs within the Seven Devils and western Boise mountains in Idaho, the Aquarius and Paunsaugunt plateaus and Abajo Mountains in Utah, and in Oregon. The association occurs in small, localized patches. In the northern portion of the range, it 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 midslopes, facing all aspects, at elevations ranging from 2400-2680 m (7900-8800 feet). <i>Pseudotsuga menziesii</i> forests are adjacent on more mesic sites. Stands are characterized by an open to closed overstory dominated by <i>Pinus ponderosa</i>. <i>Symphoricarpos oreophilus, Purshia tridentata</i>, and <i>Amelanchier alnifolia</i> are common associates of the conspicuous understory shrub layer.
Comm #7599	CEGL000557 » more details accession code: VB.CC.3167.CEGL000557 NOT CURRENTLY ACCEPTED	EcoArt 2002	0
Comm #7600	Pinus palustris - Pinus (echinata, taeda) - Quercus falcata - Carya texana Woodland » more details accession code: urn:lsid:vegbank.org:commConcept:36622-{8A8748F1-A236-49EE-A603-142C0A1E983E}	NatureServe Biotics 2019	0	This sandy upland <i>Pinus palustris</i> woodland of the West Gulf Coastal Plain occurs on topographically isolated ridgetops or other dry sites naturally prone to reduced fire frequencies. Due to infrequency of natural fires and proximity to mesic habitats, the overstory supports a natural mixture of <i>Pinus palustris, Pinus echinata</i>, and <i>Pinus taeda</i>. A well-developed, fairly diverse layer of hardwoods is also present in the subcanopy and midstory. The most typical hardwood species are <i>Quercus falcata</i> and <i>Carya texana</i>. The short-shrub stratum is patchy to dense and may include a number of species, at least some of which are indicative of sandy, yet not xeric conditions.