Print Report

CEGL004039 Uniola paniculata - Schizachyrium littorale - Panicum amarum Grassland

Type Concept Sentence: No Data Available


Common (Translated Scientific) Name: Sea-oats - Shore Little Bluestem - Bitter Panicgrass Grassland

Colloquial Name: South Atlantic Loamy Coastal Dune Grassland

Hierarchy Level:  Association

Type Concept: This dunegrass association occurs on ocean front dunes on barrier islands and barrier spits in the Mid-Atlantic Coastal Plain, from southeastern Virginia to South Carolina and possibly Georgia. Uniola paniculata is the dominant species, with Schizachyrium littorale and Panicum amarum also common and characteristic. Ammophila breviligulata may be common in Dare and Currituck counties of northeastern North Carolina, and in southeastern Virginia. Other typical species include Croton punctatus, Oenothera humifusa, Physalis walteri, Hydrocotyle bonariensis, Heterotheca subaxillaris, and Chrysopsis gossypina. This is the characteristic foredune vegetation immediately south and north of the Outer Banks of North Carolina, perhaps associated with slightly loamier soils with more influence of riverine sediments.

Diagnostic Characteristics: No Data Available

Rationale for Nominal Species or Physiognomic Features: No Data Available

Classification Comments: At the northern range limit, this vegetation shares many species with dune grasslands characterized by Ammophila breviligulata and Panicum amarum var. amarum. Where the two grasslands overlap geographically, dominance by Uniola paniculata may be the only means of distinguishing this type from northern dune grasslands. Scattered clumps of Uniola paniculata have been recently discovered at Chincoteague National Wildlife Refuge and Wallops Island in Virginia, where they were previously unknown, suggesting that this species may be migrating northward.

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

Physiognomy and Structure: No Data Available

Floristics: Vegetation is a sparse to dense (30-80% cover), relatively tall (0.5-2 m) herbaceous layer dominated by native grasses Uniola paniculata, Schizachyrium littorale, and less often Panicum amarum and Spartina patens. Forbs always include Hydrocotyle bonariensis and may include Gaillardia pulchella, Heterotheca subaxillaris, and Smilax smallii. This community supports many North Carolina state-rare species, including Chamaesyce bombensis, Chamaesyce polygonifolia, Iva imbricata, and Physalis walteri.

Dynamics:  No Data Available

Environmental Description:  This dunegrass association occurs on gently to moderately sloping dunes. Soils range from excessively drained to well-drained sand. The unvegetated surface is dominated by bare sand (85-97% cover) with some leaf litter (2-14%), large rocks (0-1%), and shells (0-3%).

Geographic Range: This association is limited edaphically to dynamic coastal dunes of the Mid-Atlantic Coastal Plain, from southeastern Virginia to South Carolina and possibly Georgia.

Nations: US

States/Provinces:  GA?, NC, SC, VA




Confidence Level: Moderate

Confidence Level Comments: No Data Available

Grank: G3

Greasons: No Data Available


Concept Lineage: No Data Available

Predecessors: No Data Available

Obsolete Names: No Data Available

Obsolete Parents: No Data Available

Synonomy: = Uniola paniculata - Schizachyrium littorale - Panicum amarum Herbaceous Vegetation (McManamay 2017b)

Concept Author(s): A.S. Weakley

Author of Description: A.S. Weakley, M.J. Russo and C.W. Nordman

Acknowledgements: No Data Available

Version Date: 11-26-07

  • Fleming, G. P., K. D. Patterson, and K. Taverna. 2017. The natural communities of Virginia: A classification of ecological community groups and community types. Third approximation. Version 3.0. Virginia Department of Conservation and Recreation, Division of Natural Heritage, Richmond, VA. [http://www.dcr.virginia.gov/natural-heritage/natural-communities/]
  • GNHP [Georgia Natural Heritage Program]. 2018. Unpublished data. Georgia Natural Heritage Program, Wildlife Resources Division, Georgia Department of Natural Resources, Social Circle.
  • McManamay, R. H. 2017b. Vegetation mapping at Cape Lookout National Seashore. Natural Resource Report NPS/SECN/NRR--2017/1561. National Park Service, Fort Collins, CO. 264 pp.
  • Nelson, J. B. 1986. The natural communities of South Carolina: Initial classification and description. South Carolina Wildlife and Marine Resources Department, Division of Wildlife and Freshwater Fisheries, Columbia, SC. 55 pp.
  • Peet, R. K., T. R. Wentworth, M. P. Schafale, and A.S. Weakley. No date. Unpublished data of the North Carolina Vegetation Survey. University of North Carolina, Chapel Hill.
  • Schafale, M. P. 2012. Classification of the natural communities of North Carolina, 4th Approximation. North Carolina Department of Environment, Health, and Natural Resources, Division of Parks and Recreation, Natural Heritage Program, Raleigh.
  • Schafale, M. P., and A. S. Weakley. 1990. Classification of the natural communities of North Carolina. Third approximation. North Carolina Department of Environment, Health, and Natural Resources, Division of Parks and Recreation, Natural Heritage Program, Raleigh. 325 pp.
  • Southeastern Ecology Working Group of NatureServe. No date. International Ecological Classification Standard: International Vegetation Classification. Terrestrial Vegetation. NatureServe, Durham, NC.