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Comm #8481
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Quercus alba - Quercus rubra - Quercus prinus / Collinsonia canadensis - Podophyllum peltatum - Amphicarpaea bracteata Forest
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accession code: VB.CC.35210.CEGL007692
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Southeastern Ecology Working Gro... |
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This association includes forests dominated by <i>Quercus alba, Quercus velutina, Quercus rubra</i>, or <i>Carya glabra, Carya alba</i>, or <i>Carya ovalis</i>, occurring over circumneutral soils in the Southern Blue Ridge and adjacent inner Piedmont. These forests can occur across a broad elevation range (530-1375 m [1750-4500 feet]) in exposed topographic settings (upper slopes), as well as on more protected sites (edges of coves). Presumed upper Piedmont examples may be at lower elevations (e.g., below 305 m [1000 feet]). Other species that can be important in the canopy include <i>Quercus coccinea, Quercus prinus</i>, and occasionally <i>Liriodendron tulipifera</i> where large gaps in the canopy have allowed for its generation On some sites, species more typical of "cove forests," such as <i>Fraxinus americana</i> or <i>Magnolia acuminata</i>, may form a very minor component. <i>Oxydendrum arboreum</i> and <i>Cornus florida</i> are common in the subcanopy. Heath species (<i>Rhododendron maximum</i> or <i>Kalmia latifolia</i>) are absent or very minor in the shrub stratum. On very high-base status soils, <i>Philadelphus hirsutus</i> or <i>Lindera benzoin</i> may be in the shrub stratum. The herbaceous stratum can be quite diverse and is characterized by mesic herbs and species associated with circumneutral soils, such as <i>Podophyllum peltatum, Arisaema triphyllum, Amphicarpaea bracteata, Adiantum pedatum, Collinsonia canadensis, Asplenium platyneuron, Brachyelytrum erectum, Actaea racemosa (= Cimicifuga racemosa), Caulophyllum thalictroides, Sanguinaria canadensis, Tradescantia subaspera, Euphorbia purpurea, Phegopteris hexagonoptera, Polystichum acrostichoides, Athyrium filix-femina ssp. asplenioides, Dennstaedtia punctilobula</i>, and <i>Dryopteris intermedia</i>. |
Comm #8482
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Pinus contorta / Menziesia ferruginea / Clintonia uniflora Forest
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accession code: VB.CC.32163.CEGL005922
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Western Ecology Working Group of... |
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This seral, large-patch to matrix lodgepole pine forest occupies the relatively cold and dry environments across a number of climax tree series and associated geographic regions. Thus, this cold mesic type is found throughout the northern Rocky Mountains and may extend as far west as the Cascade Crest on environments characterized as montane to lower and even mid-subalpine. The association's possible elevation range is from 915 to 1800 m (3000-5700 feet), and it consistently occurs on cool northwest- through east-facing slopes with moderate to extreme degrees of slope. It is generally associated with collecting positions from midslope to toeslope and foot-slopes when it occurs in subalpine zones, but in the more mesic montane zones, it can be found on all positions. The range of parent materials is literally as great as possible types occurring in the northern Rocky Mountains and northernmost middle Rocky Mountains and may include some ultramafics east of the Cascade Crest. The soils are acidic to very acidic, uniformly moderately well-drained to well-drained and have a highly variable coarse-fragment content. Ground surfaces have virtually no exposed rock or bare soil, and duff accumulations vary from moderate to deep. The overstory canopy is often on the cusp between open and closed (defined as 60%) and decidedly dominated by <i>Pinus contorta</i>, but its cover is often less than 40%. A number of other conifers may be present; on warmer sites these include <i>Thuja plicata, Tsuga heterophylla</i>, and <i>Abies grandis</i>, and on colder or higher elevation sites are found <i>Abies lasiocarpa, Tsuga mertensiana</i>, and <i>Picea engelmannii</i>. However, the most frequent canopy codominants or associates are the seral species <i>Larix occidentalis, Pseudotsuga menziesii</i>, and in a restricted portion of the type's range <i>Pinus monticola</i>. <i>Menziesia ferruginea</i> conspicuously dominates the tall-shrub layer. <i>Alnus viridis ssp. sinuata</i> and <i>Taxus brevifolia</i> are the only other tall shrubs consistently present. The short-shrub layer exhibits greater diversity with <i>Vaccinium membranaceum, Paxistima myrsinites, Rosa gymnocarpa, Rubus parviflorus</i>, and <i>Spiraea betulifolia</i> being consistently present. <i>Linnaea borealis, Chimaphila umbellata</i>, and <i>Vaccinium scoparium</i> have high constancy in the dwarf-shrub layer. <i>Bromus vulgaris</i> (or <i>Bromus ciliatus</i>) are the only graminoids of note. The diagnostic forbs <i>Clintonia uniflora</i> and <i>Tiarella trifoliata</i> have high constancy (both approaching 100%) and/or cover; however, a number of other forbs also exhibit high constancy across this type's range, including <i>Arnica latifolia</i>, (<i>Arnica cordifolia</i> at lower elevations), <i>Coptis occidentalis, Cornus canadensis, Galium triflorum, Goodyera oblongifolia, Maianthemum stellatum, Osmorhiza berteroi (= Osmorhiza chilensis), Orthilia secunda (= Pyrola secunda), Thalictrum occidentale, Trillium ovatum, Viola orbiculata</i>, and <i>Xerophyllum tenax</i>. As with the forb layer, the bryoid layer cover apparently varies inversely with the degree of canopy closure. |
Comm #8483
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CEGL007452
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accession code: VB.CC.7135.CEGL007452
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EcoArt 2002 |
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Comm #8484
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Alnus rubra Forest Alliance
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accession code: VB.CC.17977.ALNUSRUBRAFORES
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Western Ecology Working Group of... |
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The vegetation within this alliance occurs along the Pacific Coast from central California north through Oregon and Washington, usually along low-elevation (0-1000 m) streams or valley bottoms, but often forming a seral community in moist coniferous forests. A disjunct of this alliance may possibly occur on moist slopes and valleys of northern Idaho between 400 and 900 m in elevation. In both the coastal and interior regions, this alliance is usually associated with Tsuga heterophylla / Thuja plicata forest. Alnus rubra is well-adapted to wet soil conditions and is highly shade-intolerant. It grows best in riparian habitats of western Oregon and Washington on alluvial valley bottom landforms and adjacent moist toeslopes. Communities within this type are usually strongly dominated by Alnus rubra, which forms a diffuse canopy. Emergent conifers, such as Pseudotsuga menziesii or Picea sitchensis, may be present, depending upon stand history. Acer macrophyllum may also be present in the tree stratum. The forest undergrowth is usually species-rich and well-developed compared to adjacent conifer forests. Common shrub species in stands of this alliance include Rubus spectabilis, Sambucus racemosa var. melanocarpa, Acer circinatum, and Menziesia ferruginea. The herbaceous layer is often well-developed, with Oxalis oregana, Polystichum munitum, and Stachys mexicana particularly common. |
Comm #8485
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A.1871
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accession code: VB.CC.1570.A1871
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
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This is technically not an alliance. It is a placeholder for a group of sparsely vegetated associations that do not have adequate vegetation descriptions, but do share certain substrate characteristics. |
Comm #8486
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CEGL001098
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accession code: VB.CC.3697.CEGL001098
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
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Comm #8487
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CEGL001504
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accession code: VB.CC.4077.CEGL001504
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
0
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Comm #8488
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Artemisia nova / Pleuraphis jamesii Shrubland
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accession code: VB.CC.23602.ARTEMISIANOVAPL
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Western Ecology Working Group of... |
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Comm #8489
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A.1971
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accession code: VB.CC.1675.A1971
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EcoArt 2002 |
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Aquatic vegetation composed of two dominant components, an emerged and a submerged one. The emerged dominant is ~Hydrocotyle umbellata$. Usually occurs in the transitional zone between the water-lily or water-lettuce mats and the sedge marsh, in shallow, eutrophic waters. |
Comm #8490
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CEGL007611
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accession code: VB.CC.7223.CEGL007611
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EcoArt 2002 |
0
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