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Add/Drop	Name	Reference	Plots↓	Description
Comm #10701	CEGL008512 » more details accession code: VB.CC.7833.CEGL008512 NOT CURRENTLY ACCEPTED	EcoArt 2002	0
Comm #10702	Chamaecyparis lawsoniana - Tsuga heterophylla / Gaultheria shallon - Rhododendron macrophyllum Forest » more details accession code: VB.CC.34040.CEGL000045	Western Ecology Working Group of...	0	This conifer forest association is found on mesic sites between 450-700 m elevation on sedimentary substrates in southwestern Oregon. Substrates are derived from sedimentary parent materials. Canopy cover averages 84% and is dominated by <i>Chamaecyparis lawsoniana</i> and <i>Pseudotsuga menziesii</i> with a significant component of <i>Tsuga heterophylla</i>. These trees are the only ones that occur with consistency in this association. Occasional individuals of <i>Abies grandis</i> are also present. Immature conifer cover averages 33%, while seedlings and saplings have the lowest density of any <i>Chamaecyparis lawsoniana</i> association. The shrub layer is very well-developed with 93% cover with <i>Gaultheria shallon</i> and <i>Rhododendron macrophyllum</i> dominating. Other shrubs which show maximal development are <i>Mahonia nervosa (= var. nervosa), Vaccinium ovatum, Mahonia aquifolium, Corylus cornuta</i>, and <i>Acer circinatum</i>. The herbaceous layer is poorly developed, though <i>Polystichum munitum</i> does maintain fairly high cover values.
Comm #10703	CEGL008513 » more details accession code: VB.CC.7834.CEGL008513 NOT CURRENTLY ACCEPTED	EcoArt 2002	0
Comm #10704	Pinus ponderosa / Calamagrostis rubescens Forest » more details accession code: VB.CC.32902.CEGL000181	Western Ecology Working Group of...	0	This association has only been described from central and northeastern Oregon, and adjacent Washington and Idaho. It is most often found between 1310 and 1830 m (4300-6000 feet) on all aspects with slopes less than 20%. Soils range from sandy or silty loams to silty clay loams and clay. Parent material is residuum and colluvium of igneous, sedimentary, and metamorphic rocks, most with a mantle of ash or loess. This open forest resembles a park-like setting typified by large trees mantling a grassy floor. It usually consists of large-diameter <i>Pinus ponderosa</i> averaging 45% (17-81%) cover, which represents the only tree. Shrub cover is low with the most common associate, <i>Symphoricarpos albus</i> having less than 2% canopy cover. <i>Calamagrostis rubescens</i> averages 38% (7-70%) cover and <i>Carex geyeri</i> supports an average of 20% (2-45%) cover. Forbs include <i>Achillea millefolium, Lupinus caudatus, Arnica cordifolia</i>, and <i>Fragaria crinita</i>, all occurring at less than 12%.
Comm #10705	CEGL003766 » more details accession code: VB.CC.5630.CEGL003766 NOT CURRENTLY ACCEPTED	EcoArt 2002	0
Comm #10706	CEGL000535 » more details accession code: VB.CC.3145.CEGL000535 NOT CURRENTLY ACCEPTED	EcoArt 2002	0
Comm #10707	Chamaecyparis lawsoniana - Tsuga heterophylla / Polystichum munitum Forest » more details accession code: VB.CC.33988.CEGL000046	Western Ecology Working Group of...	0	This giant conifer association grows on mesic sites between 300-800 m elevation in southwestern Oregon and northwestern California. Stands are found on moist benches and well-watered slopes up to 35%. Soils are well developed, gravelly silt loams of comparative depth. The tree canopy is dominated by <i>Pseudotsuga menziesii, Chamaecyparis lawsoniana</i> and <i>Tsuga heterophylla</i>. <i>Abies grandis, Alnus rubra, Acer macrophyllum</i>, and <i>Lithocarpus densiflorus</i> are common associates. The vigorous immature conifer layer averages 47% cover and is dominated by <i>Tsuga heterophylla</i>. The shrub stratum is poorly developed, attaining an average of only 9% cover. <i>Gaultheria shallon</i> and <i>Mahonia nervosa (= var. nervosa)</i> are common in the low-shrub stratum, while <i>Lithocarpus densiflorus</i> dominates the tall-shrub layer. The dense herbaceous layer is dominated by <i>Polystichum munitum</i> and <i>Oxalis oregana</i> which make up 80% of the herbaceous cover. Moss cover averages 39%. The high cover of the herbaceous layer (63%), with dominance by <i>Polystichum munitum</i> and <i>Oxalis oregana</i> differentiate this community from other <i>Chamaecyparis lawsoniana</i> forest associations.
Comm #10708	Chamaecyparis lawsoniana / Rhododendron occidentale / Carex spp. Temporarily Flooded Forest » more details accession code: VB.CC.33987.CEGL000047	Western Ecology Working Group of...	0	This is an open-canopy, coniferous forest found on metamorphic substrates, primarily serpentine and gneiss, in southwestern Oregon and northwestern California. These forests are found entirely along streams and in wet, serpentine meadows, between 305 and 1525 m (1000-5000 feet) in elevation. The forests are old, but vary widely in appearance, with many of the trees appearing stunted, and the forests not very productive, in spite of the perennial water. <i>Chamaecyparis lawsoniana</i> is the primary dominant in all stands. In many stands, <i>Pseudotsuga menziesii</i> is codominant, although it is absent from the wettest meadows. <i>Pinus jeffreyi</i>, or rarely <i>Pinus attenuata</i> can also be locally important. The understory is characterized by a fairly dense cover of <i>Rhododendron occidentale</i>. Few other shrubs are found, although <i>Quercus vacciniifolia</i> and <i>Arctostaphylos viscida</i> are often present. Since these stands are riparian and wetland habitats, they are often mixed with serpentine meadows. Graminoids, including <i>Carex</i> species, <i>Deschampsia caespitosa, Eriophorum crinigerum</i>, and forbs, including <i>Darlingtonia californica, Rudbeckia californica, Triantha glutinosa (= Tofieldia glutinosa)</i>, and <i>Narthecium californicum</i> are generally found in wet openings. It is distinguished from similar associations by its unique serpentine wetland habitat and abundant herbaceous undergrowth.
Comm #10709	Abies concolor - Chamaecyparis lawsoniana - Picea breweriana / Quercus vacciniifolia Forest » more details accession code: VB.CC.34344.CEGL000049	Western Ecology Working Group of...	0	This association occurs at moderate elevations of 1285-1420 m (4220-4650 feet) on northerly aspects in southwestern Oregon. The soil remains cold late into the growing season inhibiting water uptake. As the soil warms it also quickly dries and moisture becomes limiting. Moss covers more than 90% of the forest floor. Rocks on the ground surface are common, and the topsoil is coarse. This association is usually found on granodiorite substrates at the lower one-third of the slope, although it can occasionally be found on midslope benches. <i>Pseudotsuga menziesii</i> is seral on all sites and <i>Pinus lambertiana</i> and <i>Pinus monticola</i> occur in most stands. All of the tree species are well represented in the regeneration layer. <i>Quercus vacciniifolia</i> is the dominant shrub with an average cover of 40%. <i>Quercus sadleriana</i> shrubs are also common. <i>Mahonia nervosa (= Berberis nervosa)</i> and <i>Arctostaphylos nevadensis</i> occur in all stands at low cover. The most common herbs are <i>Arnica cordifolia</i> and <i>Galium ambiguum</i>.
Comm #10710	Thuja plicata / Linnaea borealis Forest » more details accession code: VB.CC.32349.CEGL000089	Western Ecology Working Group of...	0	This evergreen forest association is found on the west slope of the Oregon Cascades, on the east slope of the Cascades near Mount Hood, and possibly extending into Washington. Stands generally occur along stream margins between 1100-1400 m elevation on all aspects. Upland stands are usually indicative of a perched water table. Soils are fine, sandy clay loams with weak subangular, blocky structure. The tree canopy is dominated by <i>Thuja plicata</i>, averaging between 30-50% cover. <i>Abies grandis</i> and <i>Picea engelmannii</i> are common tree associates. Occasionally <i>Populus balsamifera ssp. trichocarpa (= Populus trichocarpa)</i> and/or <i>Populus tremuloides</i> may be conspicuous associates. <i>Linnaea borealis</i> is always present though cover values rarely exceed 5%. Other shrubs may include <i>Acer circinatum, Ribes lacustre, Mahonia nervosa</i>, and <i>Athyrium filix-femina</i>. The most common forb is <i>Maianthemum stellatum</i>. A rich and varied assortment of other shrubs and forbs is usually present.