Oriental Smartweed Persicaria longiseta (de Bruyn) MoldenkeNon-native  -  Invasive    Synonyms: Oriental Lady's Thumb, Polygonum caespitosum var. longisetum, Polygonum cespitosum var. longisetum.
Kingdom Plantae   >   Division Tracheophyta   >   Class Magnoliopsida   >   Order Caryophyllales   >   Family Polygonaceae   >   Genus Persicaria   

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Oriental Smartweed in Anne Arundel Co., Maryland (9/22/2010). Photo by Bill Harms. (MBP list)

Oriental Smartweed in Dorchester Co., Maryland (7/31/2016). Photo by Wayne Longbottom. (MBP list)

Oriental Smartweed growing in Calvert Co., Maryland (7/19/2015). Photo by Mary B. Hollinger. (MBP list)

Oriental Smartweed in Calvert Co., Maryland (6/2/2020). Photo by Ben Springer. (MBP list)

Oriental Smartweed blooming in Calvert Co., Maryland (9/30/2017). Photo by Bill Hubick. (MBP list)

Oriental Smartweed in Talbot Co., Maryland (8/9/2016). Photo by Wayne Longbottom. (MBP list)

Oriental Smartweed in Frederick Co., Maryland (10/10/2016). Photo by Wayne Longbottom. (MBP list)

Oriental Lady's Thumb in Frederick Co., Maryland (6/27/2015). Identified by Kerry Wixted. Photo by Bill Hubick. (MBP list)

Oriental Smartweed in Anne Arundel Co., Maryland (8/11/2017). Photo by Wayne Longbottom. (MBP list)

Oriental Smartweed in Prince George's Co., Maryland (9/26/2020). (c) Maggie Park, some rights reserved (CC BY-NC). Photo by Maggie via iNaturalist. (MBP list)

Oriental Smartweed in Prince George's Co., Maryland (9/26/2020). (c) Maggie Park, some rights reserved (CC BY-NC). Photo by Maggie via iNaturalist. (MBP list)


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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/.