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Reference
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Description |
Comm #4681
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Pinus ponderosa / Bromus inermis Ruderal Woodland
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accession code: urn:lsid:vegbank.org:commConcept:31845-{47EBEE0C-74C9-40D5-BDF5-CACD72302593}
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NatureServe Biotics 2019 |
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This is a woodland of native <i>Pinus ponderosa</i> with an exotic grass understory. While currently reported from the Colorado Front Range and southwestern Utah, it undoubtedly is more widespread in the West. <i>Bromus inermis</i> has been seeded in thousands of hectares as pasture grass throughout the western U.S. It requires some sort of subirrigation or moisture, so is found escaped into riparian areas, draws and hollows. In some places the seeding took place beneath mature <i>Pinus ponderosa</i> trees, and in other locations, <i>Pinus ponderosa</i> is slowly invading the <i>Bromus inermis</i> pasture. Stands are dominated by <i>Bromus inermis</i> with 30-40% foliar cover, with an open, park-like structure to the overstory canopy of trees, either mature or young sapling size, contributing around 20% canopy cover. |
Comm #4682
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Populus tremuloides - Abies concolor / Poa pratensis Ruderal Forest
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accession code: urn:lsid:vegbank.org:commConcept:31849-{6881F2F1-0E5A-44BA-88C6-9389E6140BE0}
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NatureServe Biotics 2019 |
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This association has only been described from Zion National Park, Utah. Additional global information will be added as it becomes available. At Zion National Park, <i>Populus tremuloides</i> and <i>Abies concolor</i> are prominent in the canopy layer of this association. The shrub layer is not significant, but there may be a presence of <i>Quercus gambelii</i> or <i>Symphoricarpos oreophilus</i>. The herbaceous layer is clearly dominated by <i>Poa pratensis</i> (over 40% cover). Other herbaceous species that are commonly present and contribute minor cover are <i>Lupinus argenteus, Vicia americana, Achillea millefolium</i>, and <i>Tragopogon dubius</i>. This association occurs at elevations above 2133 m (7000 feet) on flat to gently sloping terrain. Soils are somewhat poorly drained clays. |
Comm #4683
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Pluchea sericea Wet Shrubland
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accession code: urn:lsid:vegbank.org:commConcept:31971-{23D358F1-3492-4D20-ABE5-D1436CE2C7A7}
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NatureServe Biotics 2019 |
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This evergreen shrubland is found in wetlands from southern California to the Sonoran Desert, and extends north into the Colorado Plateau in southwestern Utah. The vegetation is characterized by a moderately dense to dense short- to tall-shrub layer (1-5 m tall) that is dominated by <i>Pluchea sericea</i>, often forming pure stands. Stands generally form small patches within other wetland and riparian vegetation. Other species are present with low cover and vary regionally. Shrub associates may include <i>Allenrolfea occidentalis, Atriplex</i> spp., <i>Baccharis</i> spp., <i>Prosopis</i> spp., <i>Salix exigua, Suaeda moquinii</i>, and introduced <i>Tamarix</i> spp. The typically sparse herbaceous layer, if present, may be composed of <i>Distichlis spicata, Schoenoplectus americanus, Sporobolus airoides</i>, or <i>Typha angustifolia</i>. The presence of weedy species is common in disturbed stands. Elevation ranges from sea level to 1220 m (4000 feet). Stands occur in canyon bottoms, irrigation ditches, streamsides, floodplains, and along the margins of springs. Sites are flat to gently sloping and are permanently or seasonally flooded with a high water table. Water chemistry may be fresh or saline/alkaline. Substrates are generally alluvial and vary from well-drained to poorly drained and coarse-textured to fine-textured soil. |
Comm #4684
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Nassella lepida Grassland
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accession code: urn:lsid:vegbank.org:commConcept:31994-{94A77A89-0E9D-4F2E-845D-E7597B2AF1AA}
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NatureServe Biotics 2019 |
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These grasslands are moderately widespread in California and occur across such a variety of environmental param that few generalities can be made. Sites range from sea level to 1700 m in elevation, and include all topographic locations. Climate is Mediterranean with mean annual precipitation ranging from about 12 cm in the southwestern San Joaquin Valley to 200 cm in the montane of northwestern California. Soils are often deep clays derived from sandstone or ultramafic substrates. They are moist to saturated in the winter, but are always dry during the summer. Stands have a medium-tall graminoid layer from 0.5-1 m in height that is dominated by the perennial, tussock-forming bunchgrass <i>Nassella lepida</i>. In some stands, this is the only perennial grass. Other perennial grasses that may be common include <i>Festuca californica, Melica californica, Poa secunda, Nassella pulchra, Nassella cernua</i>, and <i>Calamagrostis koelerioides</i>. Cover of the bunchgrasses is described as typically low, but quantitative information is not available. Emergent shrubs and trees may be present. Stands that occur on ultramafic parent materials will have additional, serpentine-adapted species. |
Comm #4685
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(Stillingia aquatica) / Panicum tenerum - Dichanthelium erectifolium Marsh
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accession code: urn:lsid:vegbank.org:commConcept:33723-{69ACF9BB-9801-4450-B23A-5CA1033D48CC}
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NatureServe Biotics 2019 |
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This association occurs in elongate interdune swales on coastal islands and peninsulas. The shrub <i>Stillingia aquatica</i> can be present, and in some occurrences may be abundant. <i>Panicum tenerum</i> and <i>Dichanthelium erectifolium</i> are dominant in stands. Other characteristic species include <i>Dichanthelium wrightianum, Fuirena scirpoidea</i>, and <i>Polygala cymosa</i>. Isolated individuals of woody species such as <i>Cephalanthus occidentalis, Nyssa biflora, Ilex cassine</i>, and <i>Ilex myrtifolia</i> may occur in this community, especially near its edges. |
Comm #4686
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Arctostaphylos glandulosa - Quercus wislizeni Shrubland
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accession code: urn:lsid:vegbank.org:commConcept:32063-{FD612A10-9303-4F0D-9668-C3CF44A99942}
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NatureServe Biotics 2019 |
1
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This shrubland association is currently only known from Point Reyes National Seashore in California, and the following description is based on occurrences there. Additional information will be added as it becomes available. This association is found at low elevations on the upper third or ridgetops of 15-22° slopes with south-southeast aspects. Soil textures range from generally moderately fine sandy clay loam to moderately coarse, sandy loam of sandstone or siltstone origin. These slopes are generally gravelly or cobbly. Most stands are above the average level of summer fog. Stands of this shrubland form an open understory herb layer and an open to continuous shrub layer. <i>Arctostaphylos glandulosa</i> and <i>Quercus wislizeni</i> are dominant. <i>Lonicera hispidula, Aira caryophyllea, Diplacus aurantiacus</i>, and <i>Notholithocarpus densiflorus</i> are also present. Additional species, contributing little cover, vary and may include <i>Umbellularia californica, Adenostoma fasciculatum, Heteromeles arbutifolia, Melica torreyana, Galium nuttallii, Holcus lanatus, Pellaea mucronata, Ceanothus cuneatus, Bromus diandrus, Agrostis hallii, Iris</i> sp., <i>Ceanothus</i> sp., <i>Vaccinium ovatum, Lepechinia calycina</i>, and <i>Pteridium aquilinum</i>. <i>Quercus wislizeni</i> may act as a shrub or a small tree in this association, probably reflecting varying moisture and fire history among stands. |
Comm #4687
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ELYMUS HERBACEOUS ALLIANCE
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accession code: VB.cc.30012.ELYMUSHERBACEOU
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NVC 2004 |
1
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Comm #4688
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Frangula californica ssp. tomentella / Hoita macrostachya Association
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accession code: urn:lsid:vegbank.org/vegbranch:commConcept:28865-{D90F3E0A-61B9-4E18-A810-8018E018D644}
NOT CURRENTLY ACCEPTED
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Northern Sierra Nevada Foothills Report |
1
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Comm #4689
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Arbutus menziesii Alliance
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accession code: urn:lsid:vegbank.org/vegbranch:commConcept:28810-{1C76453E-9F16-4BDF-B505-2291392FA4E9}
NOT CURRENTLY ACCEPTED
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MCV2 |
1
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Comm #4690
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Fraxinus latifolia
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accession code: urn:lsid:vegbank.org/vegbranch:commConcept:28577-{1BD07461-0419-41EE-93CB-0929EDEB52D8}
NOT CURRENTLY ACCEPTED
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CDFW Natural Communities List |
1
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