Swamp Smartweed Persicaria hydropiperoides (Michaux) Small  Synonyms: Persicaria opelousana, Polygonum hydropiperoides, Polygonum opelousanum.
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Swamp Smartweed in Anne Arundel Co., Maryland (9/7/2013). Photo by Bill Harms. (MBP list)

Swamp Smartweed in Anne Arundel Co., Maryland (8/3/2011). Photo by Bill Harms. (MBP list)

Swamp Smartweed blooming in Calvert Co., Maryland (8/22/2013). Photo by Jim Stasz. (MBP list)

Swamp Smartweed in Anne Arundel Co., Maryland (7/29/2014). Photo by Jim Stasz. (MBP list)

Swamp Smartweed blooming in Prince George's Co., Maryland (9/30/2017). Photo by Bill Hubick. (MBP list)

Swamp Smartweed in Prince George's Co., Maryland (9/30/2017). Photo by Bill Hubick. (MBP list)


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