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Reference
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Description |
Comm #5791
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Pleuraphis mutica - Panicum obtusum Herbaceous Vegetation
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accession code: VB.CC.20826.PLEURAPHISMUTIC
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Western Ecology Working Group of... |
0
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This Chihuahuan Desert lowland grassland association is known from southern New Mexico, Trans-Pecos Texas, and southeastern Arizona, and probably occurs in northern Mexico. It commonly occurs in closed basin bottoms, swales, playas or occasionally on lava flows at low elevations from 1300-1525 m (4250-5000 feet). Pleuraphis mutica (= Hilaria mutica) is dominant and abundant. The presence of Panicum obtusum is diagnostic of the playa-like setting of this association. Overall, diversity is moderate with 32 species recorded for type. Shrubs are not significant. |
Comm #5792
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Ledum glandulosum / Sanguisorba officinalis / Sphagnum spp. Shrubland
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accession code: VB.CC.33443.CEGL003436
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Western Ecology Working Group of... |
0
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This early-seral association occurs in open mire complexes in poorly drained basins and valleys. It is known in Oregon only from coastal Curry County, and presumably extends into northern California, but likely habitat diminishes farther south of Del Norte County. Circular or elliptical hummocks 1-3 feet taller than the surrounding mire surface form islands of ombrotrophic vegetation in otherwise minerotrophic mire fed by springs and runoff. Mature trees are absent. The shrub layer is dominated by <i>Ledum glandulosum</i> with 3-75% cover. <i>Gaultheria shallon</i> is a frequent associate, but <i>Vaccinium uliginosum</i> is scarce. <i>Sphagnum palustre</i> with up to 99% cover fills openings among the <i>Ledum</i> stems. The herb layer is extremely diverse and includes 21 species. <i>Sanguisorba officinalis</i> is the dominant herb, with up to 60% cover. <i>Carex echinata ssp. phyllomanica, Blechnum spicant</i>, and <i>Agrostis exarata</i> are characteristic of this association. A diversity of herbaceous species present are unusual for wetland associations. <i>Sisyrinchium californicum</i> is otherwise known mostly from deflation plains among coastal sand dunes. <i>Veratrum californicum</i> is more common in montane meadows than coastal peatlands. <i>Carex buxbaumii</i> is otherwise known in Oregon only from middle to upper elevations in the Cascade Range. <i>Helenium bolanderi, Rhynchospora capitellata, Senecio triangularis (= var. angustifolius)</i>, and <i>Lilium occidentale</i> are all at the northern end of their range. Hollows between hummocks are generally wet, species-poor, and consist almost entirely of lawns of <i>Sphagnum angustifolium, Sphagnum pacificum</i>, or bare muddy bottoms if trailed by elk and deer. |
Comm #5793
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Tsuga heterophylla / Menziesia ferruginea Forest
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accession code: VB.CC.25302.TSUGAHETEROPHYL
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Western Ecology Working Group of... |
0
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This regionally endemic plant association is described as a unit of potential natural vegetation from stands located in the Selkirk Mountains of Washington and Idaho, within the eastern-most portion of the Okanogan Highlands ecoregional section. The association occurs between 4500-5200 feet elevation on cool, moist sites on gentle, south-facing slopes and ridgelines. It is the highest elevation Tsuga heterophylla association; frost and high snowpacks are common. Soils are silt loams to loams; in the Okanogans derived from volcanic ash over mixed colluvium or glacial till. The structure of stands of this evergreen, needle-leaved forest can vary greatly, depending on stand age. Mature stands will generally have an open appearance, with 75-95% canopy cover and large Tsuga heterophylla dominating. Younger, seral stands are codominated by dense canopies of Abies lasiocarpa, Picea engelmannii and Tsuga heterophylla. The understory is very species-poor, consisting of a deciduous shrub layer with cover over 50%. Characteristic shrubs include Menziesia ferruginea, Rhododendron albiflorum and Vaccinium membranaceum. Herbs are very sparse, with only Goodyera oblongifolia showing any constancy. |
Comm #5794
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Vaccinium caespitosum / Sanguisorba officinalis Dwarf-shrubland
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accession code: VB.CC.32496.CEGL003438
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Western Ecology Working Group of... |
0
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This association occurs on acidic mineral soil around the margins of seasonally wet meadows in the northern Coast Range of Oregon. Trees and tall shrubs are absent. <i>Vaccinium caespitosum</i> forms a network of low thickets and hummocks 0.3-0.5 m in height around openings with seasonally flooded shallow pools with a very sparse cover of <i>Carex obnupta</i> and sheets of the tiny black liverwort <i>Cephaloziella</i>. <i>Vaccinium caespitosum</i> covers 30-70% of the stands, and <i>Sanguisorba officinalis</i> may cover up to 85% of the herb layer. Stunted <i>Spiraea douglasii</i> and <i>Camassia quamash</i> suggest that the soil has very low nutrient status. <i>Thuja plicata, Rhododendron</i> spp., and <i>Gaultheria shallon</i> occur on logs and other elevated microsites and can eventually shade out the association if hydrology is altered or a sufficient area of elevated substrate develops. <i>Sphagnum</i> and <i>Aulacomnium palustre</i> occur among the <i>Vaccinium</i> hummocks and may cover 50-95% of the moss layer. <i>Anemone oregana var. felix</i> is present in these stands. |
Comm #5795
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Lysimachia terrestris - Dulichium arundinaceum - Rhexia virginica Herbaceous Vegetation
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accession code: VB.CC.18008.LYSIMACHIATERRE
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Eastern Ecology Working Group of... |
0
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This Coastal Plain pondshore community occurs in central New England and Ontario. Seasonally flooded basins supporting this community usually have a permanent central water body without emergent vegetation. The shoreline is gently sloping, generally less than 10% where measured. A thin to moderately deep layer of muck overlies sand, and total vegetation cover is generally over 75%. This vegetation generally occurs on the higher margins of ponds, indicating a relatively short hydroperiod. Characteristic species include Calamagrostis canadensis, Lycopus uniflorus, Lysimachia terrestris, Dulichium arundinaceum, and Juncus canadensis. Other associates occurring at low frequency include Glyceria acutiflora, Glyceria canadensis, Triadenum virginicum, Viola lanceolata, Gratiola aurea, Euthamia tenuifolia, Scirpus pungens, Cladium mariscoides, and Galium palustre. |
Comm #5796
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Chamaecyparis lawsoniana / Rhododendron occidentale Forest
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accession code: VB.CC.33986.CEGL003443
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Western Ecology Working Group of... |
0
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This is an open-canopy, coniferous forest found on metamorphic substrates, primarily serpentine and gneiss, in southwestern Oregon and northwestern California. It is found along the coast in Del Norte County, California, and adjacent Curry County, Oregon. These forests occur on toeslopes, lower slopes and stream terraces between 762 and 1204 m (2500-3950 feet) in elevation. The forests are old, approaching giant conifer status, although are less productive than most coastal Port Orford-cedar stands, with only moderate softwood volumes (the highest being about 10,000 cubic feet per acre). <i>Chamaecyparis lawsoniana</i> and <i>Pseudotsuga menziesii</i> dominate most stands. <i>Pinus lambertiana</i> and <i>Lithocarpus densiflorus</i> are present in most stands, but with fairly low cover. The understory is characterized by shrubs, with an average of 24% cover of <i>Rhododendron occidentale</i>. Other shrubs include <i>Gaultheria shallon, Gaultheria humifusa, Mahonia nervosa, Corylus cornuta, Quercus vacciniifolia</i>, and <i>Rubus ursinus</i>. No forbs or graminoids were found with much cover or consistency in stands, but <i>Xerophyllum tenax, Carex</i> species, <i>Goodyera oblongifolia</i>, and <i>Chimaphila</i> sp. are all reported. It is distinguished from similar associations by the lack of abundant herbaceous undergrowth and non-wetland, non-serpentine habitat. |
Comm #5797
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CEGL002925
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accession code: VB.CC.5176.CEGL002925
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
0
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Comm #5798
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CEGL002952
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accession code: VB.CC.5186.CEGL002952
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EcoArt 2002 |
0
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Comm #5799
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CEGL002236
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accession code: VB.CC.4752.CEGL002236
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
0
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Comm #5800
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CEGL001692
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accession code: VB.CC.4256.CEGL001692
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
0
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