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Name
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Reference
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Plots↓
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Description |
Comm #4421
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Pinus contorta / Arnica cordifolia Forest
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accession code: urn:lsid:vegbank.org:commConcept:29044-{4972256F-7EE5-4BAF-B8E6-ED39100ADADB}
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NatureServe Biotics 2019 |
1
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This association is found in the upper montane and subalpine zone of the central and northern Rocky Mountains. Stands typically occur on cool, dry sites on gentle to moderate slopes with variable aspects depending on elevation. Soils are well-drained, gravelly loams, silts or silty clay loams generally derived from acidic, noncalcareous parent materials. Ground cover is mostly litter, often with duff over 3 cm deep, but bare ground and rock cover may be significant in some stands (to 20% cover). The vegetation is characterized by a <i>Pinus contorta</i>-dominated tree canopy with <i>Arnica cordifolia</i> dominant in the understory. The tree canopy varies from moderately dense to nearly closed (40-90% cover) and is often solely dominated by <i>Pinus contorta</i>. However, in some stands scattered <i>Abies lasiocarpa, Picea engelmannii, Pinus albicaulis, Pinus flexilis, Populus tremuloides</i>, or <i>Pseudotsuga menziesii</i> trees may be present, especially in the subcanopy. Stands generally have a depauperate understory, which may include sparse shrub layers composed of scattered tree saplings, <i>Ribes lacustre, Shepherdia canadensis</i>, or <i>Symphoricarpos oreophilus</i>. <i>Vaccinium scoparium</i> is absent or rare. <i>Arnica cordifolia</i> (indicator species) generally dominates in the sparse to moderately dense herbaceous layer. Other frequent herbs include <i>Antennaria racemosa, Astragalus miser, Chamerion angustifolium, Orthilia secunda</i>, and <i>Thalictrum occidentale</i>. |
Comm #4422
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Pinus ponderosa / Mahonia repens Forest
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accession code: urn:lsid:vegbank.org:commConcept:29096-{E028B25C-FD70-4D6E-A4B6-624106EFA8C5}
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NatureServe Biotics 2019 |
1
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This association has been described for only the Little Rocky Mountains of north-central Montana and the Black Hills of eastern Wyoming. Stands occur below 1280 m (4200 feet), adjacent to major creek bottoms and the lower toeslopes and footslope positions on adjacent slopes, showing no favor for particular aspects. In Montana, post-fire seral conditions can be dominated by almost pure stands of <i>Populus tremuloides</i> with scattered <i>Pinus ponderosa</i> in the seedling-sapling layer. Seral stands may also have relatively few veteran, fire-scarred <i>Pinus ponderosa</i> with <i>Populus tremuloides</i> in the understory. Stands undisturbed by fire (at least for several hundred years) may be pure <i>Pinus ponderosa</i>. The undergrowth is shrub-dominated with <i>Mahonia repens</i>, the diagnostic species, having the highest cover with <i>Prunus virginiana, Symphoricarpos occidentalis</i> and <i>Spiraea betulifolia</i> usually common. The only graminoid of note is <i>Oryzopsis asperifolia</i>. Forbs with high constancy include <i>Eurybia conspicua, Thalictrum occidentale, Viola canadensis, Galium boreale</i>, and <i>Monarda fistulosa</i>. In stands at Devils Tower, Wyoming, the overstory was dominated by <i>Pinus ponderosa</i> with cover in the 25-60% range. Though a range of tree sizes was present, it was difficult to identify two distinct strata. <i>Juniperus scopulorum</i> and <i>Quercus macrocarpa</i> were present but sparse. Shrub cover was less than 25% in stands sampled. <i>Mahonia repens</i> often dominated the shrub stratum but was sometimes sparse. <i>Symphoricarpos albus</i> was sometimes present but sparse. Herbaceous cover was in the 25-100% range, with a diverse mix of grassland and woodland species. <i>Nassella viridula</i> was a common graminoid in both stands sampled. |
Comm #4423
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Pinus ponderosa / Prunus virginiana Forest
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accession code: urn:lsid:vegbank.org:commConcept:29101-{C91EEA36-A527-4C72-B46D-199D637280DD}
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NatureServe Biotics 2019 |
1
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This community type is found in the Black Hills and northeastern Rocky Mountains, and western Great Plains escarpments of the United States. It occurs on gentle to moderate (2-40%), north-facing slopes and close to streams. A few stands are on rolling uplands. The soils are sandy loam or loam. This forest community has a closed canopy of <i>Pinus ponderosa</i>. Seedlings and saplings of <i>Crataegus succulenta</i> and <i>Fraxinus pennsylvanica</i> are often scattered in the understory. These species may grow to be mature trees near streams. There are two shrub layers in this community. The most prominent layer is approximately 1 m tall and dominated by <i>Prunus virginiana</i>. <i>Amelanchier alnifolia</i> also contributes significantly to this layer. The lower shrub layer is approximately 50 cm tall. It is dominated by <i>Mahonia repens</i> with lesser amounts of <i>Juniperus communis, Ribes missouriense, Rosa woodsii, Symphoricarpos albus</i>, and <i>Toxicodendron rydbergii</i>. The diversity of forbs is moderate, but most of the coverage of the herbaceous layer is provided by graminoids. <i>Apocynum androsaemifolium, Elymus caninus, Carex inops ssp. heliophila, Galium boreale, Schizachne purpurascens</i>, and <i>Maianthemum stellatum</i> are typical components of the herbaceous layer. |
Comm #4424
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Pinus ponderosa / Purshia tridentata / Pseudoroegneria spicata Woodland
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accession code: urn:lsid:vegbank.org:commConcept:29106-{5E0B4DF7-BC4D-4691-8FD6-0B813B70525F}
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NatureServe Biotics 2019 |
1
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This woodland occurs in the eastern Cascades of Oregon and Washington, the Blue Mountains in eastern Oregon and adjacent Idaho, and California's Modoc Plateau. It has been described as a phase in Idaho and Montana and may be present there. Elevations vary between 460 and 1650 m (1500-5400 feet) on all aspects and slopes of 0-40%. Soils are gravelly loamy sand to fine sandy loam. Blue Mountains sites tend to be steep while Modoc occurrences are on relatively level lava tube benches on rolling basalt plateaus. <i>Pinus ponderosa</i> is the only tree and covers 5-47% over <i>Purshia tridentata</i> (1-21% cover). <i>Pseudoroegneria spicata</i> and <i>Festuca idahoensis</i> cover 1-20%. The former is more abundant on steep and stony sites. The later is absent from California stands. Species of lesser importance include <i>Achillea millefolium, Lomatium triternatum</i>, and <i>Lathyrus nevadensis</i>. Fires have historically maintained <i>Pinus ponderosa</i> while thinning <i>Purshia tridentata</i> and <i>Juniperus occidentalis</i>. Overgrazed and other disturbed sites have high amounts of <i>Bromus tectorum</i>. |
Comm #4425
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Abies concolor / Arctostaphylos patula Forest
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accession code: urn:lsid:vegbank.org:commConcept:29151-{64B6484C-827A-47C4-AF71-54AE77165FB9}
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NatureServe Biotics 2019 |
1
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This woodland association has been reported from mountains and plateaus in southwestern Utah. Elevation ranges from 2390-2680 m (7840-8880 feet). Stands occur on a variety of sites including steep to gentle, middle to lower slopes and benches. Typically sites are relatively cool with northerly aspects common. Substrates are typically loamy soils derived from limestone parent materials. This association is characterized by an uneven-aged, open to moderately dense tree canopy that is dominated or codominated by <i>Abies concolor</i>. Codominants are <i>Pinus ponderosa</i> or <i>Pseudotsuga menziesii</i>. Dense patches of <i>Arctostaphylos patula</i> dominate the open to moderately dense shrub layer. Other shrub species present may include <i>Paxistima myrsinites, Symphoricarpos oreophilus, Mahonia repens, Ceanothus</i> spp., <i>Juniperus communis, Ribes cereum</i>, and <i>Purshia tridentata</i>. The herbaceous cover is sparse (<20% cover) and is primarily composed of graminoids with scattered forbs. |
Comm #4426
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Quercus kelloggii Alliance
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accession code: urn:lsid:vegtwig.vegbank.org:commconcept:417-{7F4BB579-7152-4F57-B35E-6195A3F82CCA}
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MCV2 |
1
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71.010.00 |
Comm #4427
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Sparsely Vegetated Shale Cliff
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accession code: urn:lsid:ecoobs.vegbank.org:commConcept:17627-{A56A361C-6D60-4860-92F3-E46E9102DA9D}
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Zimmerman et al. 2012 |
1
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Comm #4428
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Sparsely Vegetated Sandstone Talus
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accession code: urn:lsid:ecoobs.vegbank.org:commConcept:17626-{D23C1325-9184-4385-91DF-CED49F306FDF}
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Zimmerman et al. 2012 |
1
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Comm #4429
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Old-field Eastern Red-cedar Woodland
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accession code: urn:lsid:ecoobs.vegbank.org:commConcept:17623-{64DBA644-5C09-4505-8D84-FF78E6F43FE7}
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Zimmerman et al. 2012 |
1
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Comm #4430
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Quercus kelloggii – Pinus ponderosa / Ceanothus integerrimus Association
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accession code: urn:lsid:vegtwig.vegbank.org:commconcept:422-{A705B75D-B1FC-4DF4-82FF-9BDAB8557C64}
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Klein et al. 2007 |
1
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71.010.28 |
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