Water Knotweed Persicaria amphibia (Linnaeus) S.F. Gray    Synonyms: Persicaria amphibia var. emersa, Persicaria meuhlenbergii, Polygonum amphibium, Polygonum coccineum.
Kingdom Plantae   >   Division Tracheophyta   >   Class Magnoliopsida   >   Order Caryophyllales   >   Family Polygonaceae   >   Genus Persicaria   

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Water Knotweed blooming in Montgomery Co., Maryland (8/14/2017). Photo by Elizabeth Miller. (MBP list)

Water Knotweed in Montgomery Co., Maryland (8/2/2014). Photo by Jim Stasz. (MBP list)

Water Knotweed in Prince George's Co., Maryland (5/21/2016). (c) piscataway park nps, some rights reserved (CC BY-NC). Photo by piscataway_park_nps via iNaturalist. (MBP list)

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