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Pinus palustris / Schizachyrium tenerum - Muhlenbergia expansa - Bigelowia nuttallii - Packera obovata Woodland | NatureServe Biotics 2019
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Name: Pinus palustris / Schizachyrium tenerum - Muhlenbergia expansa - Bigelowia nuttallii - Packera obovata Woodland Reference: NatureServe Biotics 2019 Description: This sparse woodland is endemic to a small portion of the West Gulf Coastal Plain, currently known only from one parish in Louisiana. It is dominated by a scattered, somewhat stunted <i>Pinus palustris</i> canopy; <i>Quercus marilandica</i> forms a patchy stunted subcanopy. <i>Pinus taeda</i> may be abundant in fire-suppressed examples. <i>Schizachyrium tenerum</i> and <i>Schizachyrium scoparium</i> are dominants in the usually dense herbaceous layer. Herbs typical of both upland <i>Pinus palustris</i> woodlands and wetter <i>Pinus palustris</i> flatwoods occur, along with more calciphilic species (e.g., <i>Neptunia lutea, Delphinium carolinianum, Silphium laciniatum, Packera obovata</i>). This community contains a highly unusual combination of species, primarily due to the close interdigitation of distinct soil and hydrologic conditions, that in turn reflect the mixed geological character of the environment. This woodland is known from the Dough Hills Member of the Fleming Formation, and is thought to occur primarily on Anacoco and Kisatchie-Anacoco soils which are inclusions in areas mapped as Vaiden-Watsonia. The Kisatchie and Anacoco soils are very strongly acidic silt loams over clay; Anacoco soils are underlain by siltstone. This community ranges from dry with a patchy herbaceous layer and foliose lichens, to more commonly mesic or wet-mesic with <i>Muhlenbergia expansa</i> and <i>Rhynchospora</i> spp. as codominants along with the other graminoid species. On the predominantly acidic to very acidic silty clays <i>Bigelowia nuttallii, Liatris acidota, Ionactis linariifolius, Euphorbia corollata, Stenaria nigricans var. nigricans, Spiranthes magnicamporum</i>, and other acidophiles are found. The historical fire frequency is estimated to be 3-4 years and, along with edaphic conditions including rock layers near but not at the soil surface, fire is believed to play a role in maintaining the open physiognomy.  Accession Code: urn:lsid:vegbank.org:commConcept:32470-{E64FD9CF-3767-4B73-BA24-E6006FC897A9} Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 18-Feb-1995 to: ongoing
	status: accepted Community's Parent: Pinus palustris / Quercus marilandica / Schizachyrium scoparium West Gulf Coastal Plain Woodland Alliance This Community's Level: Association This Community's Children: [none]		Names:   UID: ELEMENT_GLOBAL.2.684980 NatureServe Explorer   Code: CEGL003597   Translated: Longleaf Pine / Slender Little Bluestem - Cutover Muhly - Nuttall's Rayless-goldenrod - Roundleaf Ragwort Woodland   Common: Louisiana Longleaf Pine Fleming Glade   Scientific: Pinus palustris / Schizachyrium tenerum - Muhlenbergia expansa - Bigelowia nuttallii - Packera obovata Woodland (convergence) and Synonyms: (similar) Pinus palustris / Quercus marilandica / Schizachyrium tenerum - Muhlenbergia expansa - Bigelowia nuttallii - Packera obovata Woodland (similar) Pinus palustris / Quercus marilandica / Schizachyrium tenerum - Muhlenbergia expansa - Bigelowia nuttallii - Packera obovata Woodland (similar) CEGL003597