Marshpepper Knotweed in Anne Arundel Co., Maryland (8/27/2012). Photo by Bill Harms. (MBP list)
Marshpepper Knotweed in Anne Arundel Co., Maryland (9/26/2011). Photo by Bill Harms. (MBP list)
Marshpepper Knotweed blooming in Baltimore City, Maryland (9/10/2017). Photo by Kirsten Johnson. (MBP list)
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Use of images featured on Maryland Biodiversity Project is only permitted with express permission of the photographer.
MBP marks as "Invasive" any taxon listed in the Maryland Invasive Species Council (MISC) list of Invasive Species of Concern in Maryland. You can read their criteria and review the lists here: https://mdinvasives.org/species-of-concern/.
Synonyms: Polygonum hydropiper.
