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Reference
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Description |
Comm #2701
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Calamagrostis purpurascens - Linanthus pungens Alpine Fell-field
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accession code: urn:lsid:vegbank.org:commConcept:36699-{8313563D-6A0B-421A-9C94-BB65E3DEBB5F}
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NatureServe Biotics 2019 |
4
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This herbaceous 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. This association grows in a fairly wide variety of xeric alpine habitats at elevations ranging from 2900-3230 m (9500-10,600 feet). Slopes can be moderate to fairly steep, and aspects are highly variable. Some stands grow in seasonally saturated soils in convex basins, while others are on xeric lower to middle slopes. Soils are rocky, well-drained and derived from metamorphic parent materials, but range in texture from sands to silt loams. This highly diverse herbaceous association is characterized by an intermittent canopy of graminoids and forbs with <i>Calamagrostis purpurascens</i> an important species. <i>Linanthus pungens</i> is diagnostic for this association, and its preferred habitat is well-drained rocky sites. <i>Elymus elymoides</i> is a fairly frequent graminoid associate, but at least 13 other graminoids have been recorded in stands at low cover values and frequencies. Traces of cover may be provided by the graminoids <i>Carex exserta, Achnatherum pinetorum, Calamagrostis canadensis, Carex heteroneura, Carex leporinella, Carex subnigricans, Festuca</i> spp., and/or <i>Poa</i> spp. The most important forbs are <i>Penstemon davidsonii, Ericameria discoidea, Minuartia nuttallii</i>, and traces of <i>Castilleja nana, Eriogonum ovalifolium</i>, and/or <i>Potentilla gracilis</i>. A few, scattered, emergent shrubs may be present, including krummholz <i>Pinus albicaulis</i> and/or <i>Salix planifolia</i>. |
Comm #2702
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Carex filifolia - Trisetum spicatum Grassland
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accession code: urn:lsid:vegbank.org:commConcept:36702-{C91A396B-103E-42D6-8C5B-1CABFB2F18E3}
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NatureServe Biotics 2019 |
4
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This herbaceous 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 alpine and subalpine grassland are found between 2650 and 3500 m (8700-11,500 feet) of elevation on gentle to moderate slopes. Aspects are variable and do not seem to be diagnostic for this type. Stands are found on basin floors, lower to upper slopes. Soils are clay loams to silt loams derived from igneous or metamorphic parent materials. This subalpine to alpine meadow grassland is dominated by <i>Carex filifolia</i> (20% cover) and <i>Trisetum spicatum</i> (5% cover). Associates are highly variable, but the most constant species are the forbs <i>Antennaria rosea</i> and <i>Solidago multiradiata</i>. Graminoids, which provide trace cover, may include <i>Danthonia intermedia, Poa secunda, Poa stebbinsii, Carex subnigricans, Carex filifolia, Carex breweri, Elymus elymoides</i>, and/or <i>Juncus patens</i>. Forb associates may include <i>Trifolium monanthum</i> and traces of <i>Antennaria media, Arenaria kingii, Castilleja nana, Eriogonum ovalifolium, Penstemon heterodoxus</i>, and/or <i>Potentilla drummondii</i>. |
Comm #2703
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Eriogonum wrightii - Eriogonum heermannii - Buddleja utahensis Scrub Alliance
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accession code: urn:lsid:vegbank.org:commConcept:39366-{B2942AC2-B0FD-418B-91E8-6FC2E49BC862}
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NatureServe Biotics 2019 |
4
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This alliance forms an open shrub layer. The emergent tree layer, when present, is typically sparse, and the herbaceous layer is sparse to open. The stands have diagnostic presence of <i>Eriogonum wrightii, Eriogonum heermannii</i>, and/or <i>Buddleja utahensis</i> in the shrub layer; other characteristic shrubs at lower cover may include <i>Eriogonum fasciculatum</i> and <i>Prunus fasciculata</i>. Shrubs that are often present include <i>Brickellia microphylla, Echinocactus polycephalus, Echinocereus mojavensis, Ericameria linearifolia, Eriogonum fasciculatum, Escobaria vivipara, Gutierrezia microcephala, Gutierrezia sarothrae, Opuntia polyacantha var. erinacea, Quercus turbinella, Scopulophila rixfordii</i>, and <i>Yucca schidigera</i>. <i>Juniperus osteosperma</i> is a commonly emergent tree at sparse cover. Dominant and characteristic herbs may include <i>Achnatherum speciosum, Arabis</i> spp., <i>Aristida purpurea, Bouteloua gracilis, Bromus rubens, Bromus tectorum, Descurainia pinnata, Elymus elymoides, Erigeron</i> spp., <i>Erodium cicutarium, Gilia</i> spp., <i>Hymenoxys cooperi, Lesquerella kingii, Lomatium nevadense, Poa secunda, Sphaeralcea ambigua</i>, and <i>Streptanthus cordatus</i>. Cryptogamic crust and moss are often present. The alliance is found in California and Arizona. In desert areas it is found primarily on bedrock outcrops at various aspects and high slopes at east to southeast aspects. It may also occur on flats, ridgetops, and stony slopes on granitic, sedimentary, or serpentine substrates. Elevations range from approximately 950 to 1900 m. Soils are derived from calcareous substrates, including limestone, sandstone with dolostone (dolomite), alluvium, and granodiorite. Textures include clay loam, sandy loam, and silty clay, as well as sandy and gravelly alluvium. |
Comm #2704
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Pinus contorta / Spiraea betulifolia Forest
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accession code: urn:lsid:vegbank.org:commConcept:29073-{E25DA36F-B16E-4CE4-97EA-C158F290CBE1}
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NatureServe Biotics 2019 |
4
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This subalpine forest association is known from the central and northern Rocky Mountains from northwestern Wyoming, across Idaho and western Montana into Canada. Elevations range from 1070 to 2500 m (3500-8200 feet). Stands occur on a variety of sites from steep colluvial slopes to gentle rolling terrain on relatively warm, dry sites. Sites at lower elevation and latitude are typically restricted to northerly aspects or limestone substrate. Higher elevation sites occur on a variety of aspects with the most northerly stands restricted to dry southern aspects. Parent materials are various. Tree litter is often 4-6 cm deep and dominates ground cover. Vegetation is characterized by an overstory tree canopy dominated by <i>Pinus contorta</i> with <i>Spiraea betulifolia</i> prominent in the understory. <i>Picea engelmannii, Pseudotsuga menziesii</i>, or <i>Populus tremuloides</i> may be present in the subcanopy. Sites are generally too cool for <i>Pinus ponderosa</i>. <i>Spiraea betulifolia</i> is a major component in the short-shrub layer with <i>Mahonia repens</i> or <i>Paxistima myrsinites</i> sometimes abundant. Other common shrubs include <i>Acer glabrum, Amelanchier alnifolia, Lonicera utahensis, Prunus virginiana, Shepherdia canadensis, Sorbus scopulina, Symphoricarpos oreophilus</i>, or <i>Symphoricarpos albus</i>. The sparse to moderately dense herbaceous layer is dominated by graminoids <i>Calamagrostis rubescens, Carex geyeri, Festuca idahoensis</i>, or <i>Pseudoroegneria spicata</i>, with a variety of forbs. |
Comm #2705
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Abies concolor / Quercus gambelii Forest
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accession code: urn:lsid:vegbank.org:commConcept:29170-{36210E28-CBEF-43B9-9F6E-F2F4304F609B}
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NatureServe Biotics 2019 |
4
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This forest association has been reported from mountains in New Mexico, Colorado, Utah, and in Arizona. Stands occur along the Mogollon Rim north to the Wasatch Range and east to the southern Rocky Mountains. Elevations range from 1680-2930 m (5500-9600 feet). This community is widespread and often occurs on middle and lower slopes and all aspects except south and southwestern. <i>Abies concolor</i> and <i>Pseudotsuga menziesii</i> typically codominate the upper tree canopy. <i>Pinus ponderosa, Pinus strobiformis</i>, and <i>Juniperus</i> spp. may also be present. <i>Quercus gambelii</i> dominates the subcanopy and undergrowth. Other shrub species may include <i>Amelanchier alnifolia, Symphoricarpos oreophilus, Robinia neomexicana</i>, and <i>Mahonia repens</i>. The sparse to moderately dense herbaceous layer is typically composed of <i>Carex rossii, Poa fendleriana, Lathyrus lanszwertii var. leucanthus, Thalictrum fendleri</i>, and <i>Achillea millefolium</i>. Stands transition to ~<i>Pinus ponderosa / Quercus gambelii</i> Woodland (CEGL000870)$$ in drier sites. |
Comm #2706
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Bouteloua gracilis Dwarf-shrub Herbaceous Alliance
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accession code: VB.cc.30637.BOUTELOUAGRACIL
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NVC 2004 |
4
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Comm #2707
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Ericameria palmeri Association (provisional)
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accession code: urn:lsid:vegtwig.vegbank.org:commconcept:241-{17341044-1402-4136-BA91-9BEA7DAB9741}
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Buck-Diaz and Evens 2015 |
4
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38.130.01 |
Comm #2708
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Quercus engelmannii / Quercus berberidifolia Association
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accession code: urn:lsid:vegtwig.vegbank.org:commconcept:465-{92E08E59-9196-4252-9192-2B1CC6D5F06A}
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MCV2 |
4
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71.070.07 |
Comm #2709
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Quercus agrifolia – Aesculus californica Association
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accession code: urn:lsid:vegtwig.vegbank.org:commconcept:459-{108B67D4-49A0-4BE9-8638-532C7681AE36}
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MCV2 |
4
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71.060.52 |
Comm #2710
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Quercus agrifolia – Quercus engelmannii / Eriogonum fasciculatum Association
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accession code: urn:lsid:vegtwig.vegbank.org:commconcept:458-{C0F64BBA-CC91-471D-B8F5-A9E65AACE85E}
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MCV2 |
4
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71.060.45 |
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