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Comm #11211	Pinus albicaulis - Abies lasiocarpa / Menziesia ferruginea / Xerophyllum tenax Woodland » more details accession code: VB.CC.28274.PINUSALBICAULIS	Western Ecology Working Group of...	0	This minor small- to large-patch community is found primarily in mid to upper subalpine habitats throughout the Nez Perce and Clearwater national forests, north into Idaho's panhandle and west into west-central Montana. East of the Continental Divide it extends northward to the Canadian Rockies of southwestern Alberta. Its distribution ranges in elevation from 1495 to 2195 m (4900-7200 feet). The lower elevation occurrences are associated with frost-pocket conditions. It usually occupies neutral to collecting positions from toeslopes to ridge shoulders and including ridgetops; it can be found on well-drained benches in cold-air drainages. Degree of slope is highly variable, but cold aspects (from northeast- through east-facing) are predominant. Parent materials are various, from intrusive volcanics of the Idaho Batholith to extrusive volcanics (andesite and basalt) to various sedimentary and metamorphic species, including quartzite, argillite, siltstone, sandstone and schist. Soils are acidic, well-drained, and soil texture is usually on the finer end of the spectrum (loams and silt loams being common). Exposed rock and soil are generally less than 5%, and the rock content in the profile often exceeds 5%, increasing markedly with depth. The overstory is usually an open canopy (less than 50% cover) dominated by a variable mix of Abies lasiocarpa, Picea engelmannii, Pinus contorta, and the indicator species Pinus albicaulis, which must have at least 5% cover for this type to be recognized as distinctive from Abies lasiocarpa - Picea engelmannii / Menziesia ferruginea / Xerophyllum tenax Forest (CEGL005895) or the Pinus contorta-dominated version of this community. The undergrowth may be quite dense with a layer of short Menziesia ferruginea overtopping tussocks of Xerophyllum tenax. Vaccinium membranaceum is highly constant and though subordinate in height (and usually in cover) to Menziesia is still regarded a dominant short shrub. The only dwarf-shrub consistently present, Vaccinium scoparium, occurs as scattered patches; if present with greater than 15% cover, then another association is indicated. The combined cover of these four species often constitutes a continuous undulating layer. Spiraea betulifolia and Lonicera utahensis are consistently scattered in the short-shrub layer. There are no graminoids regularly present. Other than the abundance of the diagnostic Xerophyllum tenax, the forb layer has low cover and is comparatively depauperate with only Arnica latifolia, Anemone piperi, Goodyera oblongifolia, Orthilia secunda (= Pyrola secunda), and Viola orbiculata having a consistent presence. On moister sites and where the shrub layer is not overwhelming, Valeriana sitchensis and/or Thalictrum occidentale are consistently present with more than 5% cover.
Comm #11212	Amphicarpum muehlenbergianum - (Panicum hemitomon) Herbaceous Vegetation » more details accession code: VB.CC.37574.CEGL008588	Carr, S. C., K. M. Robertson, an...	0	This depression pond community, dominated by <i>Amphicarpum muehlenbergianum</i>, is found nearly throughout Florida with the exception of south Florida. In addition, <i>Panicum hemitomon</i> may be present or may dominate adjacent zones. This association is intended to accommodate distinctive stands with dominance or at least codominance by <i>Amphicarpum muehlenbergianum</i>. This species is primarily found in Florida and southern Georgia, and is rare or absent in other southeastern states.
Comm #11213	Artemisia nova / Poa secunda Shrubland » more details accession code: VB.CC.34321.CEGL001423	Western Ecology Working Group of...	0	This plant association is discontinuously distributed from southeastern Oregon to southeastern and central Idaho, with a disjunct occurrence in western Colorado. It is purported to occur in California and expected to occur in northern Nevada and Utah. The association has been reported from a wide variety of habitats at elevations ranging from about 1525 to 2745 m (5000-9000 feet). Stands are on shallow, rocky and gravelly calcareous soils that may be of volcanic origin or derived from limestone. Although it is often in mosaic with <i>Artemisia tridentata</i> or <i>Juniperus</i> spp. stands, this association does not support significant cover or reproduction of these species, nor perennial grasses other than <i>Poa secunda</i>. Some (but not all) stands may represent overgrazed stands of ~<i>Artemisia nova / Pseudoroegneria spicata</i> Shrubland (CEGL001424)$$. <i>Artemisia nova / Poa secunda</i> stands are expected to have low amounts of other shrubs, such as <i>Artemisia arbuscula, Artemisia tridentata ssp. vaseyana, Chrysothamnus viscidiflorus, Eriogonum microthecum</i>, and <i>Tetradymia canescens</i>. Other herbs to be expected in these stands include perennial grasses, such as <i>Achnatherum</i> spp., <i>Koeleria macrantha</i>, and <i>Elymus elymoides</i>, and forbs common on shallow soils, such as <i>Balsamorhiza hookeri, Castilleja</i> spp., <i>Eriogonum</i> spp., <i>Petradoria pumila, Phlox</i> spp., and <i>Penstemon</i> spp. Its presence in Colorado may represent another <i>Artemisia nova</i> association that has been degraded by grazing until only <i>Poa secunda</i> and <i>Koeleria macrantha</i> remain.
Comm #11214	CEGL004553 » more details accession code: VB.CC.6094.CEGL004553 NOT CURRENTLY ACCEPTED	EcoArt 2002	0
Comm #11215	Baccharis pilularis / Artemisia pycnocephala - Scrophularia californica Shrubland » more details accession code: VB.CC.34355.CEGL001426	Western Ecology Working Group of...	0	This association is found in the sand dunes that exist in scattered localities along the northern Pacific coast. It develops in areas inland of the foredune, on sand plains and dune ridges, where less wind and salt spray allows better vegetative stabilization of the taller dunes. This is an open, low (1-2 m tall), primarily evergreen scrub community. It is dominated by <i>Baccharis pilularis</i>, with a lower, denser layer of evergreen subshrubs and perennial forbs, including <i>Artemisia pycnocephala, Scrophularia californica, Lupinus arboreus</i>, and <i>Eriogonum latifolium</i>. Seedlings of <i>Pinus contorta</i> occur in most examples of this association. Successionally may follow one of the pioneering herbaceous dune communities which have stabilized dune sands enough to permit establishment of shrubby species. Close to the shore, this association may persist indefinitely because wind and salt spray inhibit tree growth. Farther from shore, wind-pruning is less and tree species may become dominant.
Comm #11216	A.1342 » more details accession code: VB.CC.1116.A1342 NOT CURRENTLY ACCEPTED	EcoArt 2002	0	This alliance is restricted to wetlands in Kansas and Oklahoma. Stands are dominated by medium-tall graminoids. Typical graminoids include ~Eleocharis palustris (= Eleocharis macrostachya), Eleocharis compressa, Leptochloa fusca ssp. fascicularis (= Leptochloa fascicularis), Ambrosia artemisiifolia, Coreopsis tinctoria, Marsilea vestita$, and others. Further study is needed to characterize this alliance. ^Habitat conditions include wet depressions, bison wallows, interdunal swales, and playa lakes.
Comm #11217	CEGL004556 » more details accession code: VB.CC.6095.CEGL004556 NOT CURRENTLY ACCEPTED	EcoArt 2002	0
Comm #11218	Atriplex gardneri Dwarf-shrubland » more details accession code: VB.CC.34299.CEGL001438	Western Ecology Working Group of...	0	This dwarf-shrubland association is reported from northern and eastern Utah, western Colorado, Wyoming and Montana. Sites are flat to steep (58%). Soils are calcareous, alkaline, and typically saline and fine-textured. One site has a gravelly/cobbly substrate. Total vegetation cover is generally sparse, rarely exceeding 15%. The vegetation is composed solely of or dominated by <i>Atriplex gardneri</i> without an herbaceous layer. Associated shrubs may include minor cover of <i>Atriplex confertifolia, Atriplex corrugata, Chrysothamnus viscidiflorus, Ephedra torreyana, Eriogonum corymbosum, Gutierrezia sarothrae, Picrothamnus desertorum, Sarcobatus vermiculatus</i>, and/or <i>Tetradymia spinosa</i>. No herbaceous layer is reported, though scattered grasses such as <i>Achnatherum hymenoides, Pleuraphis jamesii (= Hilaria jamesii)</i>, and <i>Elymus elymoides</i> may be present. Invasive species such as <i>Bromus tectorum, Halogeton glomeratus</i>, and <i>Malcolmia africana</i> are present in some stands. Biological soil crusts may cover up to 50% of the ground surface. The dominance of <i>Atriplex gardneri</i> and the lack of a significant herbaceous layer are diagnostic of this association.
Comm #11219	Atriplex obovata / Sporobolus airoides - Sporobolus cryptandrus Dwarf-shrubland » more details accession code: VB.CC.34296.CEGL001447	Western Ecology Working Group of...	0	This association has only been described from a small area of the upper Rio Puerco watershed of northwestern New Mexico. It occurs in a semi-arid basin between 1647 and 1830 m (5400-6000 feet) elevation and is found on alluvial flats, with 0-2% slopes and fine-textured alluvial parent materials. Soils are calcareous Typic Torrifluvents, with clay, fine sandy loam, or silty clay loam textures. This is a sparsely vegetated dwarf-shrubland, with total plant cover <20%. The dwarf, evergreen shrub <i>Atriplex obovata</i> is the dominant species. Other shrubs with trace cover include the succulents <i>Opuntia imbricata, Opuntia polyacantha</i>, and the deciduous dwarf-shrub <i>Krascheninnikovia lanata</i>. Several perennial grass species may be present; <i>Sporobolus airoides</i> is the most constant and abundant, with <i>Sporobolus cryptandrus</i> and <i>Pleuraphis jamesii (= Hilaria jamesii)</i> typically present. Total herbaceous cover averages 4-6%, with forbs contributing only trace amounts. Species diversity is very low.
Comm #11220	Eriogonum sphaerocephalum / Poa secunda Dwarf-shrub Herbaceous Vegetation » more details accession code: VB.CC.34167.CEGL001448	Western Ecology Working Group of...	0	This plant association is described for the Columbia Plateau of southeastern Washington and northeastern Oregon. Stands are also known from the upper Hells Canyon in Idaho. The association occurs on basalt Lithosol sites ranging in elevation from 488 to 945 m (1600-3100 feet) on the Columbia Plateau and 1067 to 1372 m (3500-4500 feet) in the upper Hells Canyon region. The association is characterized by an open dwarf-shrub canopy dominated by <i>Eriogonum sphaerocephalum</i>. The relatively sparse understory is dominated by <i>Poa secunda</i>; <i>Eriogonum thymoides</i> may also be present. <i>Pseudoroegneria spicata</i> and <i>Elymus elymoides</i> are commonly present with low abundance. Forb composition is variable. <i>Trifolium macrocephalum, Balsamorhiza hookeri, Lomatium bicolor var. leptocarpum (= Lomatium leptocarpum)</i>, and <i>Allium acuminatum</i> are often present.