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Taxodium ascendens / Carex striata - Iris tridentata - (Woodwardia virginica) Swamp Woodland
Translated Name: Pond-cypress / Walter's Sedge - Savanna Iris - (Virginia Chainfern) Swamp Woodland
Common Name: Atlantic Coastal Plain Pond-cypress Depression (Peatland Sedge Type)
Unique Identifier: CEGL004087
Classification Approach: International Vegetation Classification (IVC)
Summary: This pond-cypress depression association is found in coastal South Carolina and possibly in coastal Georgia and North Carolina. Taxodium ascendens dominates this primarily open-canopy wetland depression that may occur as a savanna or meadow with few trees. The herbaceous layer is typically overrun by mats of rhizomatous Carex striata. Zones of Woodwardia virginica (or occasionally Panicum hemitomon) are found in larger depressions. A variety of bay species occur intermixed among the Carex striata, with Iris tridentata, Paspalum praecox, Eriocaulon compressum, Rhexia aristosa, Lobelia boykinii, Xyris spp., and Rhynchospora spp. being most common. In the outer edges or drawdown zones, Sarracenia flava may be in abundance. This association is highly variable in composition depending upon the fire frequency, recent rainfall, and anthropogenic alterations to hydrology.



Classification

Classification Confidence: Moderate

Vegetation Hierarchy
Class 1 - Forest & Woodland
Subclass 1.B - Temperate & Boreal Forest & Woodland
Formation 1.B.3 - Temperate Flooded & Swamp Forest
Division 1.B.3.Nb - Southeastern North American Flooded & Swamp Forest
Macrogroup Pond-cypress Basin Swamp
Group Pond-cypress Basin Swamp
Alliance Pond-cypress / Walter's Sedge Depression Swamp Forest

This is the revised vegetation hierarchy. For more information see Classification Sources and usnvc.org.

Similar Associations
Unique Identifier Name
CEGL003733 Taxodium ascendens / Panicum hemitomon - Polygala cymosa Swamp Woodland
CEGL004089 Taxodium ascendens - Nyssa biflora / Carex striata - Rhynchospora (careyana, cephalantha) Stringer Swamp Woodland
CEGL004090 Taxodium ascendens / Aristida palustris Swamp Woodland
CEGL004441 Taxodium ascendens / Woodwardia virginica Swamp Woodland
CEGL007718 Carex striata var. striata - Xyris fimbriata - Lachnanthes caroliana Marsh



Related Concepts from Other Classifications

Other Related Concepts
Related Concept Name: Taxodium ascendens-Carex striata-Iris tridentata-(Woodwardia virginica) Depression Woodland
Relationship: = - Equivalent
Reference: Glitzenstein, J. S., and D. R. Streng. 2004. Evaluating the NatureServe preliminary plant community classification for Francis Marion National Forest. Tall Timbers Research Station, Tallahassee, FL. Plus appendices and data.

Ecological Systems Placement

Ecological Systems Placement
Ecological System Unique ID Ecological System Name
CES203.251 Southern Coastal Plain Nonriverine Cypress Dome
CES203.262 Southern Atlantic Coastal Plain Depression Pond


NatureServe Conservation Status
Global Status: G3 (08Jan2007)
Rounded Global Status: G3 - Vulnerable
Reasons: This is a relatively common type in Francis Marion National Forest (Glitzenstein and Streng 2004). The maintenance of this vegetation type depends on frequent low-intensity fires that limit competition from hardwood trees and shrubs.

Distribution
Color legend for Distribution Map
United States Distribution: GApotentially occurs, SC
Global Distribution: United States
Global Range: This association is found in coastal South Carolina and possibly in coastal Georgia.

U.S. Forest Service Ecoregions
Domain Name: Humid Temperate Domain
Division Name: Subtropical Division
Province Name: Outer Coastal Plain Mixed Forest Province
Province Code: 232 Occurrence Status: Confident or certain
Section Name: Atlantic Coastal Flatwoods Section
Section Code: 232C Occurrence Status: Confident or certain


Vegetation

Vegetation Summary: Taxodium ascendens dominates the canopy with Nyssa biflora and Pinus serotina being fairly common. Acer rubrum and Liquidambar styraciflua may reach the canopy if fire has been suppressed. A well-developed shrub layer is not common, but under conditions of fire suppression Lyonia lucida, Persea palustris, Magnolia virginiana, Clethra alnifolia, and/or Smilax spp. (e.g., Smilax laurifolia, Smilax walteri) will be found. More commonly Hypericum fasciculatum will occur as a low shrub even under a frequent burn regime. The most common herbaceous species are Carex striata, Woodwardia virginica, and Iris tridentata. Other prominent herbs may include Panicum hemitomon, Paspalum praecox, Eriocaulon compressum, Rhexia aristosa, Lobelia boykinii, Lachnanthes caroliana, Xyris spp. (Xyris brevifolia, Xyris fimbriata, Xyris smalliana), Rhynchospora spp. (Rhynchospora careyana, Rhynchospora cephalantha, Rhynchospora filifolia), and Saccharum spp. (Saccharum brevibarbe var. contortum, Saccharum giganteum).

Vegetation Composition (incomplete)
Species Name Rounded Global Status Growth Form Stratum Charact-
eristic
Dominant Constant
Cover Class %
Con-
stancy
%
Taxodium ascendens G3 Needle-leaved tree Tree canopy  
 
 
Iris tridentata G3 Flowering forb Herb (field)  
 
 
Lobelia boykinii G3 Flowering forb Herb (field)      
 
 
Woodwardia virginica G3 Fern (Spore-bearing forb) Herb (field)  
 
 
Carex striata G3 Graminoid Herb (field)  
 
 


At-Risk Species Reported for this Association
Scientific Name
  (Common Name)
NatureServe Global Status U.S. Endangered Species Act Status
Iris tridentata
  (Savanna Iris)
G3G4  
Lobelia boykinii
  (Boykin's Lobelia)
G2G3  


Environmental Setting

Wetland Indicator: Y


Dynamic Processes

Dynamics: The maintenance of this vegetation type depends on frequent low-intensity fires that limit competition from hardwood trees and shrubs and help to maintain the high diversity of herbaceous vegetation. Similarly, drought cycles will result in temporary shifts in species composition or the temporary absence of otherwise common species.


Plot Sampling & Classification Analysis

Plots stored in VegBank


Authors/Contributors
Concept Author(s): J. Gramling after Glitzenstein and Streng
Element Description Edition Date: 20Apr2004
Element Description Author(s): M. Pyne
NatureServe Conservation Status Factors Edition Date: 22Feb2007
NatureServe Conservation Status Factors Author(s): M. Pyne and C. Nordman

Ecological data developed by NatureServe and its network of natural heritage programs (see Local Programs) and other contributors and cooperators (see Sources).


References
  • Glitzenstein, J. S., and D. R. Streng. 2004. Evaluating the NatureServe preliminary plant community classification for Francis Marion National Forest. Tall Timbers Research Station, Tallahassee, FL. Plus appendices and data.

  • Southeastern Ecology Working Group of NatureServe. No date. International Ecological Classification Standard: International Vegetation Classification. Terrestrial Vegetation. NatureServe, Durham, NC.


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