Common (Translated Scientific) Name: Dense-flower Knotweed - (Sugarcane Plumegrass) Shoreline Wet Meadow

Colloquial Name: Knotweed Pondshore

Hierarchy Level:  Association

Type Concept: This seasonally to semipermanently flooded vegetation occurs as a band ringing the shores of ponds in the East Gulf Coastal Plain and probably adjacent provinces including the Mississippi River Valley Alluvial Plain. Plots attributable to this association have also been sampled from seasonally inundated floodplains in the Piedmont of Georgia. It is dominated by the perennial Polygonum glabrum. Associated species include Lemna minor, Saccharum giganteum, Hydrocotyle umbellata, Saururus cernuus, Carex lupulina, Triadenum walteri, Cephalanthus occidentalis, Leersia sp., Ludwigia peploides, Boehmeria cylindrica, Juncus effusus, Rhynchospora corniculata, Ludwigia decurrens, Habenaria repens (within its range), Mikania scandens, Scirpus cyperinus, and others. At Reelfoot Lake, Tennessee (Mississippi River Alluvial Plain), this vegetation occupies the margins of ditches, sloughs, and boat channels. In some stands, Bidens laevis inhabits this community and is apparently spreading into reservoirs and impoundments in Mississippi.

Diagnostic Characteristics: No Data Available

Rationale for Nominal Species or Physiognomic Features: No Data Available

Classification Comments: Occurrence of this community outside the East Gulf Coastal Plain needs assessment. What is presumed to be this vegetation type has been observed at Reelfoot National Wildlife Refuge (Lake and Obion counties, Tennessee).

Similar NVC Types: No Data Available

note: No Data Available