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CEGL007472 Quercus laurifolia - Magnolia virginiana - Nyssa biflora / Chasmanthium ornithorhynchum Swamp Forest

Type Concept Sentence: No Data Available


Common (Translated Scientific) Name: Laurel Oak - Sweetbay - Swamp Tupelo / Birdbill Woodoats Swamp Forest

Colloquial Name: East Gulf Coastal Plain Swamp Tupelo Bayhead Forest (Clayey Type)

Hierarchy Level:  Association

Type Concept: This saturated forest association is found in the East Gulf Coastal Plain from Louisiana to Alabama in bayheads over sticky clay or silt loam soils. In Alabama, it is reported from Mobile County near the origin of small, low-gradient streams. The canopy is dominated by Quercus laurifolia, Nyssa biflora, Magnolia virginiana, and Acer rubrum var. rubrum. Subcanopy species are Magnolia virginiana, Acer rubrum var. rubrum, and Fraxinus caroliniana. Common components of the open shrub stratum are Cyrilla racemiflora, Vaccinium elliottii, Eubotrys racemosa, Rhododendron viscosum, Viburnum nudum var. nudum, Toxicodendron radicans, Chionanthus virginicus, and Lyonia lucida. The herb stratum is sparse and composed of Chasmanthium ornithorhynchum, Carex glaucescens, Carex intumescens, Carex lonchocarpa, and Carex venusta var. minor. Carex gigantea, Rhynchospora cephalantha, Xyris laxifolia var. iridifolia, Woodwardia virginica, and scattered Sabal minor are reported from Alabama examples. Sphagnum macrophyllum is sometimes abundant. Sticky clay soils, generally less acidic conditions, and a more open understory distinguish this association from other baygall types.

Diagnostic Characteristics: No Data Available

Rationale for Nominal Species or Physiognomic Features: No Data Available

Classification Comments: No Data Available

Similar NVC Types: No Data Available
note: No Data Available

Physiognomy and Structure: No Data Available

Floristics: The canopy is dominated by Quercus laurifolia, Nyssa biflora, Magnolia virginiana, and Acer rubrum var. rubrum. Subcanopy species are Magnolia virginiana, Acer rubrum var. rubrum, and Fraxinus caroliniana. Common components of the open shrub stratum are Cyrilla racemiflora, Vaccinium elliottii, Eubotrys racemosa (= Leucothoe racemosa), Rhododendron viscosum, Viburnum nudum var. nudum, Toxicodendron radicans, Chionanthus virginicus, and Lyonia lucida. The herb stratum is sparse and composed of Chasmanthium ornithorhynchum, Carex glaucescens, Carex intumescens, Carex lonchocarpa, and Carex venusta var. minor. Carex gigantea, Rhynchospora cephalantha, Xyris laxifolia var. iridifolia, Woodwardia virginica, and scattered Sabal minor are reported from Alabama examples. Sphagnum macrophyllum is sometimes abundant.

Dynamics:  No Data Available

Environmental Description:  This association is found in the East Gulf Coastal Plain from Louisiana to Alabama in bayheads over sticky clay or silt loam soils. In Alabama, it is reported from Mobile County near the origin of small, low-gradient streams. Sticky clay soils, generally less acidic conditions, and a more open understory distinguish this association from other baygall types.

Geographic Range: This association is known from the East Gulf Coastal Plain and Upper East Gulf Coastal Plain from Alabama to Louisiana.

Nations: US

States/Provinces:  AL, LA, MS




Confidence Level: Low - Poorly Documented

Confidence Level Comments: No Data Available

Grank: G2?

Greasons: No Data Available


Concept Lineage: No Data Available

Predecessors: No Data Available

Obsolete Names: No Data Available

Obsolete Parents: No Data Available

Synonomy: < IIA2a. Bay Forest (Allard 1990)

Concept Author(s): A.S. Weakley and L.M. Smith

Author of Description: A.S. Weakley and L.M. Smith

Acknowledgements: No Data Available

Version Date: 04-03-95

  • ALNHP [Alabama Natural Heritage Program]. 2018. Unpublished data on file. Alabama Natural Heritage Program, Auburn University.
  • Allard, D. J. 1990. Southeastern United States ecological community classification. Interim report, Version 1.2. The Nature Conservancy, Southeast Regional Office, Chapel Hill, NC. 96 pp.
  • LNHP [Louisiana Natural Heritage Program]. 2009. Natural communities of Louisiana. Louisiana Natural Heritage Program, Louisiana Department of Wildlife & Fisheries, Baton Rouge. 46 pp. [http://www.wlf.louisiana.gov/sites/default/files/pdf/page_wildlife/6776-Rare%20Natural%20Communities/LA_NAT_COM.pdf]
  • Southeastern Ecology Working Group of NatureServe. No date. International Ecological Classification Standard: International Vegetation Classification. Terrestrial Vegetation. NatureServe, Durham, NC.