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Add/Drop	Name	Reference	Plots↓	Description
Comm #11171	Pinus ponderosa / Artemisia tridentata - Purshia tridentata Woodland » more details accession code: VB.CC.32937.CEGL000178	Western Ecology Working Group of...	0	This association is a fairly open woodland with a shrub and grass mosaic understory that occurs on sites at 780-1710 m (2550-5600 feet) elevation. Soils are sand or loam to clay-loam in texture and are underlain by pumice, lava, and basalt. Stands occur on all aspects and slopes up to 55%. The tree canopy is composed of <i>Pinus ponderosa</i> often with <i>Juniperus occidentalis</i>, both with 1-30% cover. Shrubs include <i>Purshia tridentata</i> (1-30% cover) and <i>Artemisia tridentata</i> (0-50% cover). The bunchgrasses <i>Festuca idahoensis</i> and <i>Elymus elymoides (= Sitanion hystrix)</i> support cover of 0-30% and 0-10%, respectively.
Comm #11172	Pinus ponderosa / Physocarpus monogynus Forest » more details accession code: VB.CC.36888.CEGL000190	Midwestern Ecology Working Group...	0	This ponderosa pine woodland is found in the Black Hills at 1310 to 1800 m (4300-5900 feet) elevation west to Colorado at 2560 to 2710 m (8400-8880 feet). This montane community is one of the more mesic of the ponderosa pine forests in the Black Hills and southern Rocky Mountains. Stands occur predominantly on north- to northwest-facing aspects but may also occur on eastern and southern aspects. Slopes tend to be moderate to steep but range from (1-49%). Soils are relatively deep, well-drained sandy loams from coarse colluvium. The overstory is dominated by <i>Pinus ponderosa</i> often with an admixture of <i>Pseudotsuga menziesii</i> and sometimes <i>Pinus flexilis</i> depending on seral stage. The canopy can be moderately open to closed. Sufficient light penetrates the canopy to allow the growth of a vigorous shrub layer (20-50% cover). There is a substantial shrub layer that grows to approximately 1 m tall. This stratum is dominated by <i>Physocarpus monogynus</i>. Other shrubs that occur in this community are <i>Acer glabrum, Amelanchier alnifolia, Mahonia repens, Prunus virginiana, Rosa acicularis, Arctostaphylos uva-ursi</i>, and <i>Symphoricarpos albus</i>. In the Rocky Mountains the tree canopy was more open, and <i>Symphoricarpos rotundifolius</i> may be present with up to 20% cover. The herbaceous layer is dominated by forbs and nonvascular plants. <i>Antennaria rosea, Cerastium arvense, Galium boreale, Pulsatilla patens</i>, and mosses and lichens are typically found in this community. Unvegetated surface is common in this association and is comprised of needle litter and duff.
Comm #11173	CEGL004437 » more details accession code: VB.CC.5997.CEGL004437 NOT CURRENTLY ACCEPTED	EcoArt 2002	0
Comm #11174	Pinus ponderosa / Purshia tridentata / Carex rossii Woodland » more details accession code: VB.CC.33187.CEGL000194	Western Ecology Working Group of...	0	This woodland is found in the southern Blue Mountains, the Ochoco Range, and southeastern Oregon Cascades. Elevations are between 1020-1980 m (3350-6500 feet) with generally low steepness (0-50%) and a variety of aspects, but favoring southerly exposures in the Blue Mountains. Soils are sandy loams, silt, and loamy sand. The overstory is dominated by <i>Pinus ponderosa</i> (25-53% cover) with occasional <i>Juniperus occidentalis</i> (0-4% cover). The shrub layer is characterized by <i>Purshia tridentata</i> (5-37% cover) and occasional <i>Mahonia repens</i> (0-36% cover). The herbaceous layer is usually dominated by <i>Carex rossii</i> with 10-46% cover. Other herbaceous species include <i>Achnatherum occidentale ssp. occidentale (= Stipa occidentalis)</i> (3-10% cover) and <i>Elymus elymoides ssp. elymoides (= Sitanion hystrix)</i> (5-10% cover). Occasionally, <i>Achillea millefolium</i> and <i>Fragaria virginiana</i> are present. This association is well-adapted to periodic surface fires which promote regeneration of <i>Pinus ponderosa</i>. It occupies warm and moist sites as compared to other <i>Pinus ponderosa / Purshia tridentata</i> associations.
Comm #11175	CEGL000817 » more details accession code: VB.CC.3421.CEGL000817 NOT CURRENTLY ACCEPTED	EcoArt 2002	0
Comm #11176	Pinus ponderosa / Purshia tridentata / Festuca idahoensis Woodland » more details accession code: VB.CC.33186.CEGL000195	Western Ecology Working Group of...	0	This association is a widespread woodland community which is a dominant part of the landscape in the eastern Cascades, and occurs as patches throughout the Blue Mountains, and in Idaho, northeastern Washington and Montana. Elevations vary between 780-1740 m (2550-5700 feet) on all aspects with slopes usually less than 35%. Soils are a mixture of sand, loam, and silt. These woodlands are dominated by <i>Pinus ponderosa</i> (5-60% cover) with occasional <i>Pinus contorta, Juniperus occidentalis</i>, or <i>Cercocarpus ledifolius</i> (less than 10% cover). The shrub layer is characterized by <i>Purshia tridentata</i> up to 50% cover with occasional <i>Arctostaphylos patula, Ericameria bloomeri</i>, and <i>Ceanothus integerrimus</i>. The herbaceous layer is usually dominated by <i>Festuca idahoensis</i> (5-40% cover) with minor herbs such as <i>Elymus elymoides ssp. elymoides (= Sitanion hystrix), Achnatherum occidentale ssp. occidentale (= Stipa occidentalis), Lupinus</i> spp., <i>Achillea millefolium</i>, and <i>Fragaria virginiana</i>. Fires have historically maintained <i>Pinus ponderosa</i> while thinning fire-sensitive subordinate trees and shrubs.
Comm #11177	Rhus trilobata / Pseudoroegneria spicata Shrub Herbaceous Vegetation » more details accession code: VB.CC.32996.CEGL001120	Western Ecology Working Group of...	0	This shrub prairie type is found in the United States on dry mid to upper slopes and ridgetops in the eastern plains and mountains of Wyoming and Montana. Slope and aspect are variable, but soils are consistently shallow and rocky. Herbaceous species dominate the vegetation with short shrubs and nonvascular plants present but of lesser importance. Total vegetation cover is moderate, and few plants grow taller than 1 m. Shrubs generally have from 10-25% cover. <i>Rhus trilobata</i> is the most common. It is often found with <i>Artemisia frigida, Artemisia tridentata, Prunus virginiana, Ribes cereum</i>, or <i>Eriogonum</i> spp. <i>Pseudoroegneria spicata</i> is the most abundant herbaceous species. Others commonly found include <i>Koeleria macrantha, Schizachyrium scoparium, Bouteloua curtipendula, Bromus tectorum</i>, and <i>Opuntia polyacantha</i>.
Comm #11178	Cupressus arizonica / Quercus turbinella Forest » more details accession code: VB.CC.22350.CUPRESSUSARIZON	Western Ecology Working Group of...	0	The distribution of this woodland association includes localized occurrences in southern and southeastern Arizona; also north of Cooke's Peak, New Mexico. This association occurs on moderately steep canyon slopes or alluvial toeslopes with mostly northerly aspects on a variety of parent materials. Elevations range from 1463 to 1768 m (4800-5800 feet). Cupressus arizonica dominates the luxuriant tree canopy that is mixed with Pinus edulis, Pinus monophylla var. fallax (= Pinus edulis var. fallax), and Juniperus osteosperma. Quercus turbinella dominates the shrub layer which is well-represented in cover and includes Quercus chrysolepis, Arctostaphylos pungens, Arctostaphylos pungens, Garrya wrightii, Ceanothus greggii, Rhus ovata, Cercocarpus montanus, and Rhamnus crocea. The herbaceous layer is scarce due to the dense tree and shrub canopy.
Comm #11179	Comunidad de Lobivia caespitosa - Tillandsia virescens » more details accession code: urn:lsid:vegbank.org:commConcept:36790-{C1B876E7-D14C-41B2-9736-E45E74D598D0}	NatureServe Biotics 2019	0	3700-4500 m. Orotropical inferior y supratropical superior pluviestacional húmedo y subhúmedo. La vegetación es epilítica y tapiza paredones rocosos irregulares o rugosos, sobre protosuelos delgados que se apoyan directamente sobre la superficie rocosa. Constituida por densas poblaciones de <i>Tillandsia capillaris f. virescens</i>, con presencia dispersa de pequeñas colonias de la cactácea <i>Lobivia maximiliana ssp. caespitosa</i> y helechitos xeromórficos como <i>Cheilanthes pruinata</i> y <i>Notholaena nivea</i>. Mayores áreas potenciales y/o actuales conocidas: La Paz, cordilleras de Apolobamba y Real; Cochabamba, Cordillera del Tunari.
Comm #11180	Pinus ponderosa / Purshia tridentata / Achnatherum occidentale Woodland » more details accession code: VB.CC.33197.CEGL000198	Western Ecology Working Group of...	0	This is an open woodland found on pumice or ash in the East Cascades and Modoc Plateau in southern Oregon and northern California. Oregon sites are associated with Mount Mazama pumice. California sites are from the Medicine Lake Highlands. This association developed with frequent, low intensity fire, although most stands have been excluded from fire for the last 80 years. With fire, these stands were probably more open and park-like, and had much lower shrub cover. Most stands are on flats and sideslopes, with an average slope of only 8%. The upper elevational range is 1720 m. In California it occurs down to 1460 m, in Oregon down to 860 m, probably because pumice occurs at lower elevations in Oregon. The community was described from 31 plots over a 100-km range in Oregon, and from 6 plots from northern California. However, very few remnants of this community are left with old-growth <i>Pinus ponderosa</i> trees. <i>Pinus ponderosa</i> is generally the only tree found in the overstory and understory. In a few Oregon stands (especially those which have been disturbed), <i>Pinus contorta</i> can also be found. Tree cover ranges from 5-40%. <i>Purshia tridentata</i> is the dominant shrub, always present and averaging about 15% cover. Other shrubs include <i>Ericameria bloomeri (= Haplopappus bloomeri), Ribes cereum</i>, and <i>Arctostaphylos patula</i>. <i>Achnatherum occidentale (= Stipa occidentalis)</i> dominates good condition stands, although with grazing, <i>Elymus elymoides</i> becomes more important. Other forbs include <i>Penstemon cinicola, Eriogonum nudum, Hieracium scouleri</i>, and <i>Carex rossii</i>. This type is easily distinguished by the dominants, and its occurrence on pumice.