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CEGL003735 Nyssa biflora - Taxodium ascendens / Ludwigia pilosa - Bacopa caroliniana Swamp Woodland

Type Concept Sentence: No Data Available


Common (Translated Scientific) Name: Swamp Tupelo - Pond-cypress / Hairy Primrose-willow - Blue Water-hyssop Swamp Woodland

Colloquial Name: East Gulf Coastal Plain Flatwoods Pond Woodland

Hierarchy Level:  Association

Type Concept: This flatwoods pond community is known from the East Gulf Coastal Plain of Louisiana and possibly Mississippi. The canopy is scattered, with Taxodium ascendens in the wettest areas, and Nyssa biflora in slightly less deeply flooded areas. The herbaceous species occur as a ''flotant,'' with species on a fibrous root mat dominated by Ludwigia pilosa and Bacopa caroliniana. Other typical species include Saururus cernuus, Xyris smalliana, Xyris fimbriata, Lachnanthes caroliana, Triadenum walteri, Pluchea rosea, Osmunda regalis var. spectabilis, Woodwardia areolata, Andropogon glomeratus var. hirsutior, Andropogon glaucopsis, Cyrilla racemiflora, and Ptilimnium sp. Hydrology may be altered by impoundment, but this appears to be a community of natural occurrence.

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 scattered, with Taxodium ascendens in the wettest areas, and Nyssa biflora in slightly less deeply flooded areas. The herbaceous species occur as a "flotant," with species on a fibrous root mat dominated by Ludwigia pilosa and Bacopa caroliniana. Other typical species include Saururus cernuus, Xyris smalliana, Xyris fimbriata, Lachnanthes caroliana, Triadenum walteri, Pluchea rosea, Osmunda regalis var. spectabilis, Woodwardia areolata, Andropogon glomeratus var. hirsutior, Andropogon glaucopsis, Cyrilla racemiflora, and Ptilimnium sp.

Dynamics:  Though this community occurs in natural drainages, its hydrology is not fully understood because the hydrology of the one known occurrence has been altered, and the water table may be artificially elevated.

Environmental Description:  This forest is associated with flatwoods ponds in the East Gulf Coastal Plain of Louisiana and possibly Mississippi.

Geographic Range: This flatwoods pond community is known from the East Gulf Coastal Plain of Louisiana and possibly Mississippi.

Nations: US

States/Provinces:  LA, MS?




Confidence Level: Low - Poorly Documented

Confidence Level Comments: No Data Available

Grank: G1?

Greasons: No Data Available


Concept Lineage: No Data Available

Predecessors: No Data Available

Obsolete Names: No Data Available

Obsolete Parents: No Data Available

Synonomy: No Data Available

Concept Author(s): A.S. Weakley

Author of Description: A.S. Weakley

Acknowledgements: No Data Available

Version Date: 01-30-09

  • 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.