Print Report

CEGL006400 Eleocharis flavescens - Xyris difformis Marsh

Type Concept Sentence: No Data Available


Common (Translated Scientific) Name: Yellow Spikerush - Bog Yellow-eyed-grass Marsh

Colloquial Name: Coastal Plain Deep Muck Pond

Hierarchy Level:  Association

Type Concept: This low, graminoid-dominated vegetation of deep muck is often associated with mid-Atlantic Coastal Plain ponds. Characteristic species include Eleocharis flavescens, Juncus pelocarpus, Fimbristylis autumnalis, Rhynchospora scirpoides, Xyris difformis, as well as occasional individuals of aquatic species such as Nymphaea odorata. This vegetation may only appear during the latter part of the growing season when water levels have dropped, and may not appear at all during years of particularly high rainfall.

Diagnostic Characteristics: No Data Available

Rationale for Nominal Species or Physiognomic Features: No Data Available

Classification Comments: This vegetation is described from Delaware, where it was seen as floating mats in an area where impoundments may have altered the hydrology. This association (if the classification is confirmed) has been noted to occur on Long Island, New York and Cape Cod, Massachusetts as well as in the Connecticut River Valley in Massachusetts

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

Physiognomy and Structure: No Data Available

Floristics: Characteristic species include Eleocharis flavescens, Juncus pelocarpus, Fimbristylis autumnalis, Rhynchospora scirpoides (= Psilocarya scirpoides), Xyris difformis, as well as occasional individuals of aquatic species such as Nymphaea odorata.

Dynamics:  This vegetation may only appear during the latter part of the growing season when water levels have dropped, and may not appear at all during years of particularly high rainfall.

Environmental Description:  No Data Available

Geographic Range: This association is found on the mid-Atlantic Coastal Plain from New Jersey to Massachusetts.

Nations: US

States/Provinces:  CT, DE, MA, NJ, NY?




Confidence Level: Low - Poorly Documented

Confidence Level Comments: No Data Available

Grank: GNR

Greasons: No Data Available


Concept Lineage: No Data Available

Predecessors: No Data Available

Obsolete Names: No Data Available

Obsolete Parents: No Data Available

Synonomy: < Common meadowbeauty - Golden hedgehyssop (Rhexia virginica - Gratiola aurea) community (Metzler and Barrett 2006)
? New England coastal plain pondshore (Rawinski 1984a)

Concept Author(s): L.A. Sneddon and K. Clancy

Author of Description: L.A. Sneddon and K. Clancy

Acknowledgements: No Data Available

Version Date: 05-11-98

  • Coxe, R. 2009. Guide to Delaware vegetation communities. Spring 2009 edition. State of Delaware, Division of Fish and Wildlife, Delaware Natural Heritage Program, Smyrna.
  • Eastern Ecology Working Group of NatureServe. No date. International Ecological Classification Standard: International Vegetation Classification. Terrestrial Vegetation. NatureServe, Boston, MA.
  • Metzler, K., and J. Barrett. 2006. The vegetation of Connecticut: A preliminary classification. State Geological and Natural History Survey, Report of Investigations No. 12. Connecticut Natural Diversity Database, Hartford, CT.
  • Rawinski, T. 1984a. Natural community description abstract - southern New England calcareous seepage swamp. Unpublished report. The Nature Conservancy, Boston, MA. 6 pp.
  • Swain, P. C., and J. B. Kearsley. 2014. Classification of the natural communities of Massachusetts. Version 2.0. Natural Heritage & Endangered Species Program, Massachusetts Division of Fisheries and Wildlife. Westborough, MA. [http://www.mass.gov/nhesp/http://www.mass.gov/eea/agencies/dfg/dfw/natural-heritage/natural-communities/classification-of-natural-communities.html]