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Name
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Reference
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Plots↓
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Description |
Comm #12061
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CEGL003712
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accession code: VB.CC.5606.CEGL003712
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
0
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Comm #12062
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II.C.3.N.a
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accession code: VB.CC.430.IIC3NA
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EcoArt 2002 |
0
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Comm #12063
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Quercus rubra - (Quercus prinus, Quercus velutina) / Rhododendron periclymenoides / Lysimachia quadrifolia - Hieracium paniculatum Forest
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accession code: VB.CC.20466.QUERCUSRUBRAQUE
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Fleming, G. P., and P. P. Coulli... |
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This community type is known only from the high-elevation granitic terrain of Amherst County, Virginia, where it occupies sites with coarse-textured colluvial soils. However, given the extent of similar environments north and south of this very restricted range, it is likely that this type is more widespread than present data suggest. This community type occurs on chiefly convex, moderately steep middle to upper slopes and ridge crests with southern to western exposures. Soils are xeric and strongly infertile with exceedingly low manganese concentrations. A characteristic feature is the volume of coarse-textured colluvium in the soil and the relative abundance of exposed cobbles, gravel, or mineral soil. All known examples are underlain by charnockite or hypersthene granodiorite. Boulders are generally sparse, but may constitute up to 20% of surface substrate. This type spans a rather broad range of elevations, from 780 m to nearly 1100 m (2560-3600 feet). Overstory composition is variable but always comprises one or more species of oak: Quercus rubra, Quercus prinus, or Quercus velutina. Quercus alba occasionally occurs as a minor associate. Canopy height seldom exceeds 20 m (65 feet), but in most stands cover of the uppermost stratum ranges from 60-80%, and thus this type is appropriately considered a forest rather than a woodland. Cover of both Quercus rubra and Quercus prinus is high in all subcanopy strata. The understory is frequently dense and contains a diversity of woody species. Kalmia latifolia, Castanea dentata, Acer rubrum, and Rhododendron periclymenoides are the most characteristic species; Nyssa sylvatica and Ilex montana attain moderately high cover when present. The herb layer, while sparse and species-poor, nevertheless contains a characteristic suite of low-cover but nearly constant herbaceous species. |
Comm #12064
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Ephedra torreyana / Bouteloua eriopoda Shrub Herbaceous Vegetation
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accession code: VB.CC.33702.CEGL001731
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Western Ecology Working Group of... |
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From Muldavin et al. (2000b): On White Sands Missile Range this is a major community within the northern Jornada Del Muerto basin but also occurs in valleys on the east side of the Oscura Mountains. This type is typically found on sandy rolling plains within the northern Jornada Del Muerto basin. It occurs less frequently on the northern Jornada lava flow and within valleys on the eastern slopes of the Oscura Mountains, at elevations of 1400 to 1610 m (4600-5300 feet). Slopes are generally flat to gentle, with little aspect differentiation, and occur on many different substrates. Stands on the Jornada plains receive wind-blown deposits, mostly from the Rio Grande valley, while stands in the Oscura Mountains receive alluvial deposits from the surrounding Paleozoic limestone and sandstone slopes. Low rolling sandy plains broken up by occasional swales characterize the landscape on the northern Jornada plains. Lava flow stands are characterized by flat platform summits overlain by wind-blown deposits. The landscape in the Oscura Mountain valleys is characterized by large, dissected, and gently sloped alluvial fans. Soils can be poorly developed (plains stands) or well-developed (lava flows or alluvial fans). Surface textures are generally coarse but become finer on the alluvial or lava stands. This Chihuahuan Desert grassland is dominated by <i>Bouteloua eriopoda</i>, with a shrub layer of scattered <i>Ephedra torreyana</i>. The grass layer is well-represented to luxurious and may include <i>Sporobolus cryptandrus</i><i>, Aristida purpurea, Sporobolus flexuosus</i> (on sandy soils), <i>Bouteloua gracilis</i> (on the Jornada lava flow) along with <i>Dasyochloa pulchella (= Erioneuron pulchellum)</i>. Other shrubs are scattered and include an occasional <i>Yucca elata</i> along with dwarf-shrubs and succulents such as <i>Gutierrezia sarothrae, Gutierrezia microcephala, Opuntia clavata</i>, and <i>Opuntia phaeacantha</i>. The forb layer is moderate in diversity (41 species) and commonly includes <i>Dimorphocarpa wislizeni, </i><i>Sphaeralcea </i>spp., <i>Solanum elaeagnifolium</i><i>, Machaeranthera pinnatifida var. pinnatifida</i>, and <i>Zinnia grandiflora</i>. |
Comm #12065
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Gutierrezia sarothrae - Krascheninnikovia lanata - Atriplex canescens / Bouteloua eriopoda Shrub Herbaceous Vegetation
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accession code: VB.CC.33873.CEGL001733
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Western Ecology Working Group of... |
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Grassland with shrubs and dwarf-shrubs. Total vegetation ground cover is 15-30%. The grasses tend to occur in patches where pockets of soil have accumulated. Characteristic species include <i>Bouteloua eriopoda, Gutierrezia sarothrae, Krascheninnikovia lanata, Atriplex canescens</i>, and <i>Sphaeralcea</i> sp. Other associated species are <i>Aristida purpurea var. fendleriana, Coleogyne ramosissima, Pleuraphis rigida (= Hilaria rigida), Scleropogon brevifolius, Lycium andersonii, Achnatherum hymenoides (= Oryzopsis hymenoides)</i>, and <i>Dasyochloa pulchella (= Erioneuron pulchellum)</i>. Found on silty loams derived from Kaibab Limestone. |
Comm #12066
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Sand Flats Temporarily Flooded Sparsely Vegetated Alliance
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accession code: VB.CC.22373.SANDFLATSTEMPOR
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Midwestern Ecology Working Group... |
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This is technically not an alliance. It is a placeholder for a group of sparsely vegetated associations that do not have adequate vegetation descriptions, but do share certain substrate characteristics. |
Comm #12067
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CEGL004662
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accession code: VB.CC.6185.CEGL004662
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
0
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Comm #12068
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CEGL004284
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accession code: VB.CC.5915.CEGL004284
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
0
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Comm #12069
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Bouteloua eriopoda - Bouteloua gracilis Herbaceous Vegetation
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accession code: VB.CC.34443.CEGL001748
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Western Ecology Working Group of... |
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This grassland association occurs on tablelands in a transition zone between the Southern Great Plains, within Bandelier National Monument in north-central New Mexico, within Salinas Pueblo Missions National Monument in central New Mexico, and in the Chihuahuan Desert in southern New Mexico. It likely extends into adjacent Texas and northern Mexico. Stands have also been described from colluvial slopes in northwestern New Mexico and from valley bottoms, slopes and benches in isolated desert mountains in southwestern New Mexico. In north-central New Mexico, this association is known from low- to mid-elevation mountain slopes and foothills, but can form more extensive stands on the upper alluvial fan piedmonts. Elevations range from 1430-1950 m. Sites are often flat to gently sloping, but range to moderately steep with variable aspects. Soils are often gravelly or sandy loam derived from gravely and sandy alluvium parent materials. On mesatops the soils are finer-textured sandy and silty loam. This desert grassland also occurs on piedmonts (bajadas) in Lower Creek watershed, San Bernardino and Animas valleys, and on cindercones of the San Bernardino Malpai. It is found in small occurrences at low to mid elevations (1500-1600 m [4900-5300 feet]). The largest occurrences are found near Red Hill in the Animas Valley and along the Mexican border in the Deer Creek watershed. This association is characterized by sparse to moderate cover of perennial bunchgrasses, of which <i>Bouteloua eriopoda</i> (1-20% cover) and <i>Bouteloua gracilis</i> (1-12% cover) are the most abundant and characteristic species. Other perennial grasses that may be present include several <i>Aristida</i> spp., <i>Bouteloua curtipendula, Bouteloua hirsuta, Eragrostis intermedia, Pleuraphis jamesii (= Hilaria jamesii)</i>, and <i>Pleuraphis mutica (= Hilaria mutica)</i>. The forb component is variable and may be diverse, but total forb cover is less than 10% and often less than 5%. Forb species typical of these desert grasslands may include species of <i>Croton, Eriogonum, Sida, Solanum, Sphaeralcea, Talinum</i>, or <i>Zinnia</i>. Some stands have scattered shrubs present, typically with less than 5% cover. Species include <i>Ephedra trifurca, Gutierrezia sarothrae, Opuntia imbricata, Prosopis glandulosa</i>, and <i>Yucca elata</i>. The diagnostic characteristics of this sparse to moderately dense grassland are the codominance of <i>Bouteloua eriopoda</i> and <i>Bouteloua gracilis</i> often with scattered shrubs. |
Comm #12070
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CEGL003896
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accession code: VB.CC.5720.CEGL003896
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
0
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