| Add/Drop |
Name
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Reference
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Plots↓
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Description |
Comm #11101
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A.222
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accession code: VB.CC.1736.A222
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
0
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Old fields and waste areas colonized by ~Albizia julibrissin$ with dense to rather sparse cover. Stands are mostly 3-7 m tall. |
Comm #11102
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CEGL000114
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accession code: VB.CC.2741.CEGL000114
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
0
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Comm #11103
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CEGL001796
» more details
accession code: VB.CC.4351.CEGL001796
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
0
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Comm #11104
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CEGL006913
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accession code: VB.CC.6929.CEGL006913
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
0
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Comm #11105
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CEGL007001
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accession code: VB.CC.6930.CEGL007001
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
0
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Comm #11106
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CEGL007002
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accession code: VB.CC.6931.CEGL007002
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
0
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Comm #11107
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CEGL007003
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accession code: VB.CC.6932.CEGL007003
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
0
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Comm #11108
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Fraxinus americana / Physocarpus opulifolius / Carex pensylvanica - Allium cernuum - (Phacelia dubia) Wooded Herbaceous Vegetation
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accession code: VB.CC.34968.CEGL008529
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Southeastern Ecology Working Gro... |
0
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This community is known only from the northern Virginia Blue Ridge and possibly the higher adjacent foothills, in areas underlain by Catoctin metabasalt (greenstone) and Middle Proterozoic plutonic rocks. Sites are located on steep (up to 37°), xeric, middle-elevation slopes where exposed outcrops effectively limit the establishment and normal development of trees. Underlying bedrock at most sites is metabasalt (greenstone). Three documented sites are underlain by charnockite, a pyroxene-bearing granitic rock, and it is likely that additional stands occur on this and related plutonic formations. Elevation of plot-sampled stands ranges from 543 to 1050 m (1782-3450 feet), with a mean of 835 m (2740 feet). Middle-slope topographic positions are typical, with slopes convex in at least one direction. Aspect varies from southeast to northwest, with westerly aspects prevalent. This vegetation type is dominated by herbaceous plants with scattered shrub patches and stunted trees. The herb layer usually ranges from 25-60% total cover (occasionally higher or lower), and from scattered to locally dense where soil and organic matter have accumulated. <i>Carex pensylvanica</i> and <i>Schizachyrium scoparium</i> are consistently dominant herbs. <i>Phacelia dubia</i> is an abundant spring ephemeral in about two-thirds of the plots, and this species may have been missed in late-season sampling of other plots. |
Comm #11109
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(Pinus virginiana, Juniperus virginiana) / Schizachyrium scoparium - Eriogonum allenii Wooded Herbaceous Vegetation
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accession code: VB.CC.37156.CEGL008530
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Fleming, G. P., and P. P. Coulli... |
0
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These rocky ridge balds are found on upper slopes and ridge crests in a small area of west-central Virginia and adjacent West Virginia. Sites for this association include broad, gently to steeply sloping, south- to west-facing spur ridge crests and middle to upper, convex sideslopes. Elevations range from 400 to 900 m. Physiognomy of this shale barren community varies from entirely herbaceous to sparse scrub or woodland. Woody strata, when present, are dominated by scattered <i>Pinus virginiana</i> and/or <i>Juniperus virginiana</i> <10 m tall. <i>Quercus rubra, Quercus prinus, Carya glabra, Fraxinus americana</i>, and <i>Celtis tenuifolia</i> are minor, inconstant woody components. <i>Rhus aromatica</i> and <i>Rosa carolina</i> are occasional shrubs. The herb layer is typically rather dense and graminoid-dominated, often giving stands a prairie-like aspect. <i>Schizachyrium scoparium</i> and <i>Carex pensylvanica</i> are consistently dominant herbs, while <i>Danthonia spicata</i> and <i>Dichanthelium linearifolium</i> are constant, locally codominant associates. <i>Andropogon gerardii</i> and <i>Sorghastrum nutans</i> are abundant in a small few stands. The shale barren endemic <i>Eriogonum allenii</i> is the most constant and abundant forb. Other relatively constant herbs are <i>Paronychia montana, Houstonia longifolia, Asplenium platyneuron, Allium cernuum, Sedum glaucophyllum, Trifolium virginicum, Cheilanthes lanosa, Polygonum tenue, Scutellaria ovata, Cunila origanoides</i>, and <i>Polygonum scandens var. cristatum</i>. Several other shale barren endemics (or near-endemics) may occasionally occur in this type as well, including <i>Antennaria virginica, Arabis serotina, Clematis albicoma, Clematis viticaulis, Oenothera argillicola, Packera antennariifolia (= Senecio antennariifolius)</i>, and <i>Trifolium virginicum</i>. This association is distinguished from other shale barrens by its more open physiognomy (often with few or no trees), low importance or absence of <i>Fraxinus americana</i> and <i>Quercus prinus</i>, high frequency and often high cover of <i>Schizachyrium scoparium</i>, and occurrence on metabasalt rather than shale. It is most closely related to the circumneutral-calcareous shale barrens and endemic-rich barrens, and differs to a greater degree from the more depauperate acidic shale barren associations. Besides <i>Eriogonum</i>, indicators include <i>Sedum glaucophyllum, Polygonum tenue, Scutellaria ovata, Clematis viticaulis</i>, and <i>Woodsia obtusa</i>. |
Comm #11110
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Diervilla lonicera - Solidago simplex var. randii - Deschampsia flexuosa - Hylotelephium telephioides - Saxifraga michauxii Herbaceous Vegetation
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accession code: VB.CC.37200.CEGL008536
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Fleming, G. P., and P. P. Coulli... |
0
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This association is known only from a few high-elevation mafic rock outcrops in the northern Virginia Blue Ridge. All known sites are located in Shenandoah National Park. This community type is associated with exposed rocky summits and upper slope outcrops of Catoctin Formation metabasalt (greenstone) at elevations from 870 to 1230 m (2860-4040 feet). Slope shape is typically convex in at least one direction, and aspect varies from west to north. The vegetation is characterized by a patchwork of shrub thickets (typically <25% cover), herbaceous mats (typically <40% cover), and crustose lichen colonies on exposed rock surfaces. The most frequent woody species include extremely stunted, wind-blasted specimens of the trees <i>Betula alleghaniensis</i> and <i>Sorbus americana</i>; characteristic shrubs and woody vines are <i>Diervilla lonicera, Physocarpus opulifolius, Prunus pensylvanica, Prunus virginiana, Kalmia latifolia</i>, and <i>Smilax tamnoides</i>. <i>Deschampsia flexuosa</i> and <i>Solidago simplex var. randii</i> are the most frequent dominant herbaceous species, but <i>Sibbaldiopsis tridentata</i><i>, Saxifraga michauxii, Carex pensylvanica</i>, and <i>Hylotelephium telephioides</i> dominate in some areas. |
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