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Reference
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Description |
Comm #3691
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Coleogyne ramosissima Mojave Desert Scrub Alliance
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accession code: urn:lsid:vegbank.org:commConcept:38432-{5C90C899-DE72-40B8-9184-24EA6D3FB5C9}
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NatureServe Biotics 2019 |
2
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These communities are characterized by a sparse to moderately dense shrub layer of <i>Coleogyne ramosissima</i>. Associated species include <i>Ambrosia</i> spp., <i>Encelia resinifera, Eriogonum fasciculatum, Ephedra nevadensis, Menodora spinescens, Grayia spinosa, Larrea tridentata, Purshia stansburiana</i>, and <i>Thamnosma montana</i>. Occasionally, scattered individuals of <i>Yucca brevifolia</i> may be emergent through the shrub layer. Scattered <i>Juniperus osteosperma</i> or <i>Pinus monophylla</i> trees are present in some stands. The herbaceous layer is typically sparse with perennial grasses and forbs commonly present. This shrubland alliance occurs in the Mojave Desert of southeastern California and southern Nevada and forms an elevational belt on desert ranges and an latitudinal belt in the transition zone with the southern Great Basin. Stands occur at elevations of 850-1600 m, usually on mountain slopes, mesas or alluvial fans bordering intermountain basins. Soils are highly variable across the large range of this vegetation type and are generally coarse-textured and well-drained, but include finer-textured substrates as well. |
Comm #3692
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Centaurea solstitialis - Isatis tinctoria - Salsola tragus Ruderal Annual Forb Alliance
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accession code: urn:lsid:vegbank.org:commConcept:38544-{3382A475-D138-4518-9E66-898AE2419250}
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NatureServe Biotics 2019 |
2
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This ruderal herbaceous alliance occurs in the interior western U.S. Vegetation is strongly dominated (>90% relative canopy cover) by invasive, exotic annual forb species such as <i>Brassica nigra, Centaurea melitensis, Centaurea solstitialis, Crupina vulgaris, Cynoglossum officinale, Hyoscyamus niger, Isatis tinctoria, Salsola tragus</i> or a mixture of other exotic annual forbs. Other exotic annual forbs are often present to dominant in disturbed stands, including <i>Bassia scoparia, Descurainia sophia, Erodium cicutarium, Lepidium perfoliatum, Onopordum acanthium, Sisymbrium altissimum</i>, and <i>Taraxacum officinale</i>. Cover of perennials is low (<5% absolute cover). Stands occur in disturbed dry to mesic basins, alluvial fans, and foothills at elevations up to 2200 m throughout the cool, semi-arid intermountain western U.S. region. It is an early-successional type that may occur in areas disturbed by fire, grazing or mining. |
Comm #3693
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Hemizonia fasciculata Meadow Alliance
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accession code: urn:lsid:vegbank.org:commConcept:39370-{700B9510-C4A9-4D1A-B730-D63B063BE177}
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NatureServe Biotics 2019 |
2
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This alliance consists of open to continuous cover of herbs <1 m in height. <i>Hemizonia fasciculata</i> is codominant or conspicuous in the herbaceous layer with <i>Amsinckia menziesii, Atriplex argentea, Atriplex coronata var. notatior, Centaurea melitensis, Centaurea solstitialis, Corethrogyne filaginifolia, Cressa truxillensis, Deschampsia danthonioides, Erodium cicutarium, Frankenia salina, Hirschfeldia incana, Hordeum depressum, Hordeum intercedens, Hordeum murinum, Lasthenia californica, Lasthenia fremontii, Marrubium vulgare, Mesembryanthemum nodiflorum, Plagiobothrys</i> spp., and <i>Trifolium</i> spp. Emergent shrubs may be present at low cover, including <i>Artemisia californica, Eriogonum fasciculatum, Gutierrezia</i> spp., <i>Hazardia squarrosa</i>, or <i>Suaeda moquinii</i>. The alliance occurs on clay flats and bottomlands, edges of vernal pools, shallow pools, and alkaline flats at 0-900 m elevation in southern California. Soils are subjected to periodic or intermittent inundation, are poorly drained fine-textured alluvium, and may be underlain by claypan or other impervious layer. |
Comm #3694
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Grindelia stricta - Grindelia sp. Wet Mudflat Alliance
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accession code: urn:lsid:vegbank.org:commConcept:39378-{AA121A4F-088A-47A6-B06A-E0FC313A6BDE}
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NatureServe Biotics 2019 |
2
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This alliance consists of intermittent to continuous cover of herbs <1 m in height. <i>Grindelia stricta, Grindelia camporum</i>, or another <i>Grindelia</i> species is dominant in the herbaceous layer with <i>Distichlis spicata, Erigeron glaucus, Frankenia salina, Jaumea carnosa, Juncus arcticus, Limonium californicum, Sarcocornia pacifica</i>, and <i>Triglochin maritima</i>. Non-native species <i>Bromus diandrus, Chenopodium murale, Hordeum murinum</i>, and <i>Mesembryanthemum crystallinum</i> can be abundant. It occurs on slightly elevated or drier ground that is adjacent to coastal dunes, salt marshes, or alkaline marshes, including bluffs, levees, and road margins. On the Channel Islands it is found on upper slopes and ridgetops on moderate to steep slopes (7-14°, 10-30%) on fine clay soils. |
Comm #3695
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Pinus contorta / Calamagrostis rubescens Forest
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accession code: urn:lsid:vegbank.org:commConcept:29048-{D6784799-FF3C-4FCC-9D45-7C807D5BFF42}
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NatureServe Biotics 2019 |
2
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This association is found in the upper montane and subalpine zone of the central and northern Rocky Mountains on cool, dry sites. It typically occurs on gentle to moderately steep, lower slopes, benches and valley bottoms where soils are better developed. Soils are gravelly, sandy or silt loams. Ground cover is dominated by litter with low cover of rock and bare ground. The vegetation is characterized by a <i>Pinus contorta</i>-dominated tree canopy with a grassy understory. The tree canopy varies from open to nearly closed (30-90% cover) and often is solely dominated by <i>Pinus contorta</i>. However, in some stands <i>Abies lasiocarpa, Picea engelmannii, Pinus albicaulis</i>, or <i>Pseudotsuga menziesii</i> trees may be present, especially in the subcanopy. Scattered dwarf- and short shrubs are often present, but they seldom form a distinct layer. Common dwarf- and short shrubs may include <i>Arctostaphylos uva-ursi, Amelanchier alnifolia, Mahonia repens, Paxistima myrsinites, Prunus virginiana, Spiraea betulifolia, Symphoricarpos oreophilus, Lonicera utahensis</i>, and <i>Vaccinium scoparium</i>. The moderately dense (30-50% cover) herbaceous layer is dominated by the perennial graminoids <i>Calamagrostis rubescens</i> and <i>Carex geyeri</i>. Diagnostic of this association is the dominance of <i>Pinus contorta</i> in the tree canopy with <i>Calamagrostis rubescens</i> dominating the graminoid layer. Also, the cover of <i>Calamagrostis rubescens</i> is greater than <i>Vaccinium scoparium</i>. |
Comm #3696
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Pinus contorta / Linnaea borealis Forest
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accession code: urn:lsid:vegbank.org:commConcept:29062-{79765D1A-2DCF-4D2B-8BA0-7BE1E24D4511}
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NatureServe Biotics 2019 |
2
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This association is found in the upper montane and subalpine zone of the central and northern Rocky Mountains. It is more common near and east of the Continental Divide. It typically occurs on cool, moist sites, often on north aspect middle to toeslopes, alluvial terraces and flats and benches. However, stands may occur on gentle to very steep slopes on any aspect. Soils are moderately well-drained, moderately deep silt or sandy loams, silts or silty clay loams derived from a variety of noncalcareous parent materials. Ground cover is mostly litter, often with duff over 6 cm deep. The vegetation is characterized by a <i>Pinus contorta</i>-dominated tree canopy with <i>Linnaea borealis</i> common in the understory. The tree canopy varies from moderately dense to nearly closed (40-90% cover) and may be solely dominated by <i>Pinus contorta</i>. However, some stands have scattered <i>Abies lasiocarpa, Larix occidentalis, Picea engelmannii, Picea glauca, Pinus albicaulis, Pinus ponderosa, Populus tremuloides</i>, or <i>Pseudotsuga menziesii</i> trees present, especially in the subcanopy. Some stands have tall- or short-shrub layers composed of tree saplings, <i>Amelanchier alnifolia, Spiraea betulifolia, Symphoricarpos albus</i>, and <i>Vaccinium membranaceum</i>. <i>Linnaea borealis</i> (indicator species) is common in the dwarf-shrub layer. Other dwarf-shrubs may include <i>Juniperus communis</i> (usually found on dry sites), <i>Paxistima myrsinites</i>, and <i>Vaccinium scoparium</i>. The sparse to moderately dense (30-50% cover) herbaceous layer is variable and may be dominated or codominated by perennial graminoids such as <i>Calamagrostis rubescens, Carex geyeri, Carex rossii</i>, and <i>Oryzopsis asperifolia</i>, or forbs like <i>Arnica cordifolia, Campanula rotundifolia, Chamerion angustifolium</i>, and <i>Maianthemum stellatum</i>. |
Comm #3697
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Pinus ponderosa / Schizachyrium scoparium Open Woodland
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accession code: urn:lsid:vegbank.org:commConcept:29110-{A4FE9548-01EB-40E0-996C-511BDECA87E2}
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NatureServe Biotics 2019 |
2
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This ponderosa pine / little bluestem association is a dry woodland found in the Great Plains of the United States extending west to the mountains of New Mexico, Colorado and Wyoming. In the Great Plains, it usually occurs on south- and west-facing slopes of hills, rocky breaks, and watercourses. In the western portion of its range, this association occurs at mid-elevation, ranging from 1780 and 2430 m (5840-7970 feet), on sites with low to high solar exposure that increases with elevation. Stands occur on gentle slopes of mesatops and shoulders (5-10%) and occasionally on steep (40%) upper canyon slopes. Soils are primarily mapped as well-developed Mollisols derived from pumice slope alluvium, or occasionally as fine-textured Alfisols derived from mixed eolian, and rarely, Aridisols derived from colluvial basalts. At El Malpais National Monument in western New Mexico, it occurs on collapse features and on the tops of very gently rolling lava plateaus. The topography varies from fractured basalt and rocky mounds to flatter areas with some soil development. Substrates are derived from volcanic basalt, and ground surface is typically dominated by rock with litter well-represented. Elsewhere, the ground surface is typically characterized by scattered bunchgrasses amid pumice gravel and litter. In the Great Plains, the overstory is dominated by <i>Pinus ponderosa</i>. <i>Juniperus scopulorum</i> may often be present, but typically only as scattered individuals. The shrub layer is composed of species such as <i>Juniperus scopulorum, Rhus trilobata</i>, and <i>Symphoricarpos</i> spp. <i>Schizachyrium scoparium</i> is the most abundant graminoid, often accompanied by <i>Andropogon gerardii, Bouteloua curtipendula, Bouteloua gracilis, Carex inops ssp. heliophila, Carex siccata, Hesperostipa comata, Pascopyrum smithii</i>, and <i>Poa pratensis</i>. Common forbs include <i>Achillea millefolium, Phlox hoodii</i>, and <i>Allium</i> spp. In New Mexico, this open woodland / savanna is dominated by <i>Pinus ponderosa</i> with canopies that range from 10-30% cover with other tree species (<i>Pinus edulis, Pseudotsuga menziesii, Quercus gambelii</i>) rare or incidental. <i>Pinus ponderosa</i> seedling and sapling reproduction is typically present. <i>Juniperus monosperma</i> and <i>Pinus edulis</i> saplings are also occasionally present in the subcanopy. Shrubs are usually poorly represented (occasionally <i>Robinia neomexicana</i> or <i>Ribes cereum</i> are well-represented). Stands are distinctively grassy (cover can reach 30%). Dominant graminoids include prairie species <i>Schizachyrium scoparium</i> along with <i>Muhlenbergia montana, Poa fendleriana</i>, and <i>Elymus elymoides</i>. <i>Bouteloua gracilis</i>, while often present, is clearly subdominant. Numerous forb species may be common to well-represented and are variable from stand to stand. |
Comm #3698
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Alnus rhombifolia / Darmera peltata Association
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accession code: urn:lsid:vegbank.org/vegbranch:commConcept:28809-{C117A213-4888-4064-975F-0B3FD50B459C}
NOT CURRENTLY ACCEPTED
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MCV2 |
2
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Comm #3699
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Suaeda moquinii Alliance
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accession code: urn:lsid:vegtwig.vegbank.org:commconcept:100-{30EBF391-BDB7-45A7-A6AC-AD02316568DC}
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MCV2 |
2
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36.200.00 |
Comm #3700
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Quercus wislizeni – Pinus sabiniana / Arctostaphylos manzanita Association
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accession code: urn:lsid:vegtwig.vegbank.org:commconcept:469-{E3208D4C-772A-4BB8-B6C5-449B46F91ADE}
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MCV2 |
2
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71.080.02 |
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