Persicaria hydropiperoides

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Common Names: swamp smartweed[1]

Persicaria hydropiperoides
Persicaria hydropiperoides SEF.jpg
Photo by John Gwaltney hosted at Southeastern
Scientific classification
Kingdom: Plantae
Division: Magnoliophyta - Flowering plants
Class: Magnoliopsida - Dicots
Order: Polygonales
Family: Polygonaceae
Genus: Persicaria
Species: P. hydropiperoides
Binomial name
Persicaria hydropiperoides
Natural range of Persicaria hydropiperoides from Weakley. [2]

Taxonomic Notes

Synonym:Persicaria opelousana (Small)

Variety: Polygonum hydropiperoides var. breviciliatum (Fernald), Polygonum hydropiperoides var. euronotorum (Fernald), Polygonum hydropiperoides var. oplousana (Riddell ex Small) J.S. Wilson,


P. hydropiperoides is a perennial forb/herb of the Polygonaceae family that is native to North America. [1]


Persicaria hydropiperoides is native throughout the continental United States excepting Colorado, Wyoming, and Utah, and has been introduced to Alaska. It is also found in British Columbia, Ontario, and Quebec.[1]



P. hydropiperoides has a high tolerance for anaerobic conditions and fire, but has a low tolerance for drought. It also requires full sunlight, extremely intolerant to shade. [1]

Habitats for Persicaria hydropiperoides include edges of cypress pond, slash pine flatwoods, and wet swale near bayou. [3]

Seed bank and germination

Seeding begins in spring and lasts until the end of summer. [1]

Conservation and Management

P. hydropiperoides is on the threatened list in Indiana and New York. [1]

Cultivation and restoration

Photo Gallery

References and notes

  1. 1.0 1.1 1.2 1.3 1.4 1.5 USDA Plant Database
  2. Weakley, Alan S. 2015. Flora of the Southern and Mid-Atlantic States: Working Draft of 21 May 2015. University of North Carolina, Chapel Hill, North Carolina. 1320 pp.
  3. URL: Last accessed: June 2018. Collectors: Richard Carter, Sidney McDaniel, Randy Haynes, Michael B. Brooks) States and counties: Georgia (Brantley) Mississippi (Pearl River, Jackson)