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(Hypericum prolificum, Leucothoe racemosa) / Schizachyrium scoparium - Solidago simplex var. racemosa - Ionactis linariifolius Sparse Vegetation | Eastern Ecology Working Group of...
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Name: (Hypericum prolificum, Leucothoe racemosa) / Schizachyrium scoparium - Solidago simplex var. racemosa - Ionactis linariifolius Sparse Vegetation Reference: Eastern Ecology Working Group of... Description: This sparse outcrop vegetation of the Potomac Gorge in Virginia and Maryland occurs on metasedimentary and intrusive igneous rock exposures that are catastrophically flood-scoured. The habitat is variable, with small pools interspersed among shaded microhabitats and exposed xeric microhabitats. The vascular vegetation generally covers <5% of a given area and consists of scattered herbs and dwarfed shrubs. The most characteristic species are <i>Schizachyrium scoparium, Solidago simplex var. racemosa (= Solidago racemosa), Dichanthelium acuminatum var. acuminatum, Ionactis linariifolius</i>, and the shrubs <i>Leucothoe racemosa</i> and <i>Hypericum prolificum</i>. Other minor, inconstant species include <i>Andropogon gerardii, Gaylussacia baccata, Juncus dichotomus, Phlox subulata, Veronicastrum virginicum, Hypericum gentianoides, Amelanchier nantucketensis</i>, and <i>Sporobolus clandestinus</i>. Small pools and potholes support inclusions of wetland species, including <i>Ludwigia alternifolia, Scirpus cyperinus, Cephalanthus occidentalis</i>, and <i>Ludwigia palustris</i>. Lichens, especially <i>Xanthoparmelia conspersa</i>, have very high cover on the rock surfaces. The bryophyte <i>Grimmia laevigata</i> is also important in areas with ephemeral seepage or surface water. This association is apparently endemic to the Potomac Gorge.  Accession Code: VB.CC.30976.CEGL006491 Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 17-Nov-2014 to: 01-May-2019
	status: accepted This Community's Level: association This Community's Children: [none]		Names:   UID: ELEMENT_GLOBAL.2.802098 NatureServe Explorer   Common: Potomac Gorge Riverside Outcrop Barrens   Translated: (Shrubby St. John's-wort, Swamp Doghobble) / Little Bluestem - Sticky Goldenrod - Flaxleaf Whitetop Aster Sparse Vegetation   Scientific: (Hypericum prolificum, Leucothoe racemosa) / Schizachyrium scoparium - Solidago simplex var. racemosa - Ionactis linariifolius Sparse Vegetation   Code: CEGL006491