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Description |
Comm #11301
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Abies grandis / Acer glabrum Forest
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accession code: VB.CC.34590.CEGL000267
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Western Ecology Working Group of... |
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These conifer forests are native to the Blue Mountains and Wallowa mountains of northeastern Oregon, southeastern Washington and Idaho's Payette National Forest. This forest association is typified by a rich shrub layer, and occurs both on mid-slopes and riparian corridors at elevations of 1000-1950 m (3300-6400 feet). Sites occur on all aspects and a wide variety of slopes. Soils tend to be silt loam and sand over residuum, colluvium, and alluvium of igneous rock with an ash mantle. The tree canopy is dominated by <i>Abies grandis</i> averaging 42% cover. Occasional codominants are <i>Picea engelmannii</i> (18% cover), <i>Pseudotsuga menziesii</i> (17% cover), and <i>Larix occidentalis</i> (10% cover). The shrub cover is composed of <i>Acer glabrum</i> (10%), <i>Vaccinium membranaceum</i> (7%), and <i>Rosa gymnocarpa</i> (4%). Cover of common herbaceous species includes <i>Arnica cordifolia</i> (6%), <i>Galium triflorum</i> (3%), <i>Osmorhiza berteroi (= Osmorhiza chilensis)</i> (3%), and <i>Thalictrum occidentale</i> (4%). <i>Bromus vulgaris</i> (2%) is the only grass reported. Codominating tree species tend to be less common in the Wallowa and Seven Devils mountains. |
Comm #11302
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CEGL003647
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accession code: VB.CC.5574.CEGL003647
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
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Comm #11303
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Abies grandis / Calamagrostis rubescens Woodland
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accession code: VB.CC.34706.CEGL000916
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Western Ecology Working Group of... |
0
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Comm #11304
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CEGL001205
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accession code: VB.CC.3800.CEGL001205
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
0
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Comm #11305
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Abies grandis / Asarum caudatum Forest
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accession code: VB.CC.34710.CEGL000269
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Western Ecology Working Group of... |
0
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This evergreen forest association is found on all terrain, usually on protected exposures or cove-like situations, on the drainages of the Clearwater River in northern Idaho between 671 and 1814 m (2200-5950 feet) elevation. Parent materials vary, but granitics and metasediments are the most common. Volcanic ash influences the upper horizons of most of the profiles. Soil textures are primarily silt loams and silty clay loams with only traces of exposed soil or rock. Gravel content is usually less than 30%. The effective rooting depth averages 50 cm with an average pH of 6.3. <i>Abies grandis</i> is the indicated climax tree species. <i>Pseudotsuga menziesii</i> along with <i>Picea engelmannii</i> (at the higher elevations) are the major seral tree species. Following disturbance, sites are frequently recolonized by <i>Abies grandis</i>, leading to even-aged stands dominated by a climax species. Occasional species are <i>Pinus monticola, Pinus ponderosa</i>, and <i>Larix occidentalis</i>. The shrub-layer species typically demonstrate low cover values. Species with high constancy are <i>Acer glabrum, Rosa gymnocarpa</i>, and <i>Symphoricarpos albus</i>. Their coverage declines with increasing stand age and canopy cover. There is high species richness and undergrowth coverage in the forb layer due to the moderate environment of this type. <i>Asarum caudatum</i> is diagnostic for this type. <i>Clintonia uniflora, Tiarella trifoliata</i>, and <i>Maianthemum stellatum (= Smilacina stellata)</i> are characteristically present. Other forbs, such as <i>Coptis occidentalis, Prosartes hookeri (= Disporum hookeri), Polystichum munitum</i>, or <i>Synthyris platycarpa</i>, may occasionally dominate this layer. |
Comm #11306
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Picea pungens / Equisetum arvense Woodland
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accession code: VB.CC.33891.CEGL000389
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Western Ecology Working Group of... |
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This association is restricted to narrow canyons and cool ravines on stream benches and streambanks in Colorado, Utah, and Wyoming. Stands occur at elevations of 2135-2745 m (7000-9000 feet) and are characterized by dominance of <i>Picea pungens</i> with a thick understory of <i>Equisetum arvense</i> and few shrubs. Other tree species possibly present include <i>Pseudotsuga menziesii, Pinus contorta</i>, and <i>Picea engelmannii</i>. Shrub cover is minor, yet diverse and may include <i>Betula glandulosa, Salix geyeriana, Salix monticola</i>, and <i>Rosa woodsii</i>. The herbaceous undergrowth typically consists of few species including <i>Equisetum arvense, Carex aquatilis</i>, and <i>Juncus balticus var. montanus</i>. Frequent flooding appears important to maintaining the species in the herbaceous layer. |
Comm #11307
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Artemisia tridentata ssp. vaseyana - Symphoricarpos oreophilus / Elymus trachycaulus ssp. trachycaulus Shrubland
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accession code: VB.CC.34463.CEGL001034
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Western Ecology Working Group of... |
0
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Comm #11308
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Abies lasiocarpa / Trautvetteria caroliniensis Forest
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accession code: VB.CC.34679.CEGL000339
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Western Ecology Working Group of... |
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This association is typified by large trees on very moist sites. This community is native from northern Idaho's Selkirk Mountains south to Oregon's Wallowa Mountains. Elevations range between 1220-1525 m (4000-5000 feet). Aspects are variable. Soils are silt loams and silt which are relatively deep. In Idaho and Washington, this community is associated with small draws and valleys less than 50 m wide. Oregon occurrences are mid-slopes as well as bottomland sites or sloping seeps. The tree canopy is dominated by <i>Abies lasiocarpa</i> and <i>Picea engelmannii</i> with 20-24% and 19-30% average cover, respectively. Small amounts of <i>Pseudotsuga menziesii</i> and <i>Larix occidentalis</i> occur in its northern distribution, while Oregon has minor <i>Pinus contorta</i> and <i>Abies grandis</i> cover. The major shrub is <i>Vaccinium membranaceum</i> (5-14% cover). Important forbs are <i>Trautvetteria caroliniensis</i> (13%) and <i>Viola orbiculata</i> (8%). |
Comm #11309
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Abies grandis / Mahonia nervosa Forest
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accession code: VB.CC.34698.CEGL000271
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Western Ecology Working Group of... |
0
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This forest association occurs in the eastern Cascades of Washington between Lake Chelan and Mount Adams on all aspects between 760-1100 m (2500-3600 feet) elevation. Two locally described associations, <i>Abies grandis / Berberis nervosa</i> and <i>Abies grandis / Berberis nervosa / Calamagrostis rubescens</i>, are included in this type. The former appears on midslopes on deeper soils with more volcanic ash and with more maritime climates than the latter, which is typically found on upper slopes. <i>Pseudotsuga menziesii</i> codominates the forest canopy with <i>Abies grandis</i>. <i>Larix occidentalis, Pinus ponderosa</i> or <i>Pinus contorta</i> can be members of the upper canopy. <i>Abies grandis</i> dominates the regeneration layers. A short-shrub layer (less than 1 m) with scattered forbs and graminoids typify the understory. The evergreen shrub <i>Mahonia nervosa (= var. nervosa)</i> is found in all examples and usually the most abundant of several shrubs. <i>Symphoricarpos mollis, Rosa gymnocarpa, Linnaea borealis</i>, and <i>Paxistima myrsinites</i> are the most commonly associated shrubs. The graminoids <i>Calamagrostis rubescens</i> and <i>Carex geyeri</i> are the most abundant and frequent herbaceous species, although a few of several possible broad-leaved forb species are always present. Sampled stands are between 75 and 125 years old; the oldest stands are around 200 years old. This association includes <i>Abies grandis</i> forest with <i>Mahonia nervosa</i> well-represented in the understory without a dominant tall-shrub component (<i>Acer circinatum</i> primarily), and/or with an herbaceous layer that is not dominated by <i>Achlys triphylla</i>. This association is found on better drained uplands sites than sites with abundant <i>Achlys triphylla</i>. <i>Spiraea betulifolia var. lucida, Calamagrostis rubescens</i>, and <i>Festuca occidentalis</i> are more common in this association than on sites with abundant <i>Achlys triphylla</i>. |
Comm #11310
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CEGL003232
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accession code: VB.CC.5364.CEGL003232
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
0
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