Comm #10824
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(Acer leucoderme, Fraxinus americana) / Schoenus nigricans Wooded Herbaceous Alliance
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accession code: VB.CC.20489.ACERLEUCODERMEF
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Southeastern Ecology Working Gro... |
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Limestone glades of the temperate Coastal Plain of the Florida panhandle and adjacent Georgia, characterized by Schoenus nigricans. The substrate consists of rather soft, chalky limestone; dominant herbaceous species are Schoenus nigricans, Hedyotis nigricans var. nigricans, Muhlenbergia capillaris, Andropogon sp., Setaria sp., Helianthus radula, and Dichanthelium sp. Nostoc is abundant on the exposed limestone. Woody species occurring in islands and borders are Berchemia scandens, Cercis canadensis, Sideroxylon sp., Morella cerifera (= Myrica cerifera), Diospyros virginiana, Fraxinus americana, Ulmus alata, Acer leucoderme, Rhus copallinum, and Viburnum sp. |
Comm #10826
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Lyonia lucida - Ilex glabra Saturated Wooded Shrubland Alliance
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accession code: VB.CC.21929.LYONIALUCIDAILE
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Southeastern Ecology Working Gro... |
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This alliance encompasses pocosins on saturated mineral or organic soils. This is the typical high pocosin or tall pocosin of peatlands and wet mineral soils of the Coastal Plain of the Carolinas and Virginia; its range extends south to Georgia and northern Florida. Pinus serotina individuals are scattered and more-or-less stunted. Typical shrubs, forming a dense tangle with abundant Smilax laurifolia, are Lyonia lucida, Ilex glabra, Ilex coriacea, Persea palustris, Cyrilla racemiflora (absent in occurrences at the northern limit of the range in southeastern Virginia), and sometimes Kalmia carolina. Other component shrubs can include Clethra alnifolia, Vaccinium formosum, Gaylussacia frondosa (= var. frondosa), Kalmia cuneata, Photinia pyrifolia (= Aronia arbutifolia), Chamaecyparis thyoides, Acer rubrum var. trilobum, Morella cerifera (= Myrica cerifera var. cerifera), Lyonia ligustrina var. foliosiflora, Magnolia virginiana, Rhus copallinum, Rhododendron viscosum, and Toxicodendron radicans. |
Comm #10830
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Saxifraga michauxii Herbaceous Alliance
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accession code: VB.CC.18407.SAXIFRAGAMICHAU
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Southeastern Ecology Working Gro... |
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This alliance consists of moderate- to high-elevation rocky summit communities of the southern and central Blue Ridge (metamorphic rock portions of the southern and central Appalachians), on various rock types, including amphibolite, metabasalt (greenstone), gneiss, and others. There are several globally rare communities contained in this alliance. More common vegetation in this alliance will have Saxifraga michauxii as a characteristic component; other species are variable, but may include Saxifraga virginiensis, Saxifraga micranthidifolia, Carex spp., Schizachyrium scoparium, and others. Examples at high elevation exhibit a sparse vegetative cover of grasses, forbs and shrubs rooted in rock fissures and occur in a matrix of Picea rubens - Abies fraseri Forest. On rock outcrops of highly fractured felsic to mafic bedrock (over 1980 m), typical species include Carex misera, Abies fraseri, Menziesia pilosa, Heuchera villosa, Rhododendron catawbiense, Saxifraga michauxii, Sorbus americana, Oclemena acuminata (= Aster acuminatus), Solidago glomerata. Other characteristic species are Minuartia groenlandica and Polypodium appalachianum. On rock outcrops of felsic Anakeesta slate in the Great Smoky Mountains (from 1646-1987 m), typical species include Saxifraga michauxii, Carex misera, Calamagrostis cainii, Rhododendron carolinianum, Solidago glomerata, Oclemena acuminata, Abies fraseri, and Leiophyllum buxifolium. Other characteristic species are Gentiana linearis and Calamagrostis cainii. At low to middle elevations (1256-1713 m) in the southern Appalachians on outcrops of mafic rock, or on felsic rock where perennial seepage exists, the sparse vegetation consists of graminoids, forbs, and shrubs. It is surrounded by deciduous forests dominated by Quercus rubra, Acer rubrum var. rubrum, and occasionally Tsuga caroliniana. Typical species here include Saxifraga michauxii, Coreopsis major, Schizachyrium scoparium, Kalmia latifolia, Dichanthelium acuminatum, Danthonia spicata, and Paronychia argyrocoma. Other characteristic species include Campanula divaricata, Solidago bicolor, and Allium cernuum (= Allium allegheniense). On amphibolite, metabasalt, metagabbro, or metagraywacke bedrock from 1350-1870 m elevation within a matrix of Quercus rubra Forest or high elevation grasslands and shrublands, the vegetation includes Saxifraga michauxii, Danthonia spicata, Krigia montana, Carex misera, Angelica triquinata, Athyrium filix-femina ssp. asplenioides, Rhododendron catawbiense, and Heuchera villosa. Other characteristic species are Sanguisorba canadensis, Sibbaldiopsis tridentata, Hylotelephium telephioides (= Sedum telephioides), Houstonia purpurea var. montana, Geum radiatum, Solidago spithamaea, and Huperzia appalachiana. In the central Blue Ridge mountains of Virginia, at elevations of 850-1200 m, this alliance occurs on greenstone (metabasalt, a mafic metamorphic rock). Characteristic herbaceous species include Hylotelephium telephioides, Solidago simplex var. randii, Heuchera pubescens, Deschampsia flexuosa, Houstonia longifolia (= Houstonia longifolia var. compacta), Dennstaedtia punctilobula, Campanula divaricata, Agrostis perennans, Carex pensylvanica, Saxifraga michauxii, Arabis lyrata, Allium allegheniense?, Phlox subulata ssp. brittonii, Sibbaldiopsis tridentata, Liatris turgida, Huperzia appalachiana, Polypodium appalachianum, Gymnocarpium appalachianum, and Oclemena acuminata. Shrubs include Physocarpus opulifolius, Sorbus americana, Betula alleghaniensis, Quercus rubra, Ribes rotundifolium, Diervilla lonicera, Hamamelis virginiana, Ilex montana, Kalmia latifolia, Menziesia pilosa, and Abies balsamea. Rare alpine disjunct species are sometimes present, including Juncus trifidus and Trisetum spicatum. |
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