Persicaria densiflora

Family (Traditional)Polygonaceae
Species:Persicaria densiflora (Meisn.) Moldenke
Common NameDenseflower Knotweed
Growth Habitforb
Plant Notes**
CharacteristicsArmaments: No; Milky Sap: No; Photosynthetic: Yes; Stipules: Yes; Woody Herbaceous: Herbaceous; Duration: Annual; Duration: Perennial; General Ecology: Terrestrial; Growth Habit: forb; Region of Origin: North America; Reproductive Phenology: June; Reproductive Phenology: July; Reproductive Phenology: August; Reproductive Phenology: September; Reproductive Phenology: October; Leaf Arrangement: alternate; Leaf Complexity: simple; Leaf Fragrance: No; Leaf Persistance: Deciduous; Leaflet Number: 0; Base Flower Color: White; Fruit Dehiscence: No; Fruit Type: Achene; Fruit Wet/Dry: Dry; Hypanthium Present: No; Ovary Position: Superior; Overall Flower Symmetry: Actinomorphic; Perianth Present: Yes; Placentation Type: Basal; Sexuality: monoclinous; Sporangium Arrangement: N/A
C value
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** Not applicable or data not available.

Currently no photos are available for this plant.

Species Distribution Map

This species has been reported in the counties highlighted in the interactive distribution map below. Click on a county to display the its name. Click the question mark icon () to view additional information about the ecoregions shown. In the map legend, there are links to toggle the visibility of the ecoregions and/or their labels. In addition, clicking on an ecoregion name will highlight that region on the map.

  • State Boundaries
  • Counties
  • Counties - Species Present
  • Southeastern Plains
    • Blackland Prarie
  • Blue Ridge Mountains
  • Ridge and Valley
  • Cumberland Plateau
  • Cumberland Mountains
  • Allegheny Plateau
  • Interior Plateau
    • Bluegrass Region
    • Nashville Basin
    • Pennyroyal Karst Plain
    • Western Highland Rim
    • Eastern Highland Rim


No synonyms exist for this species.

Specimens and Distribution

This species has been reported in the following counties by the herbaria listed. An overview of the individual specimens are provided in the table that follows. Click on the accession number to view details; click on column headers to sort.

Counties included on distribution map: Madison (KY), Benton (TN), Hardin (TN), Obion (TN), Overton (TN)

Herbaria represented by specimen data listed below: APSC, BEREA

Range of years during which specimens were collected: 2011 - 2011

Accession No. (click for full details) County State Coll. Date Collector &
Collection No.
Herbarium &
Herbarium Name Used
BEREA018715 Madison Kentucky
Persicaria densiflora
APSC0015363 Hardin Tennessee 01 Oct 2011 David H. Webb
Persicaria densiflora
APSC0091317 Obion Tennessee
Persicaria densiflora
APSC0098085 Overton Tennessee
Persicaria densiflora
APSC0007547 Benton Tennessee
Persicaria densiflora
APSC0091329 Obion Tennessee
Persicaria densiflora
APSC0098086 Overton Tennessee
Persicaria densiflora
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