*Polygonum aviculare Linnaeus ssp. neglectum (Besser) Arcangeli. Common name: Needle-leaf Knotweed. Phenology: Jun-Nov. Habitat: Fields, disturbed areas. Distribution: Native of Europe. Documented from scattered locations in s. PA (Rhoads & Klein 1993); DE, NJ, and MD (Kartesz 1999); and WV (as P. aviculare ssp. rurivagum) (Costea & Tardif 2003).
Origin/Endemic status: Europe
Synonymy ⓘ: = Can, FNA5, K4, Mo3, NE, NY; = Polygonum neglectum Besser — GrPl, Il, Tat; < Polygonum aviculare L. — C, G, NcTx, Pa, RAB, Tn, WH3; ? Polygonum aviculare L. var. angustissimum Meisn.; < Polygonum aviculare L. var. aviculare — F; ? Polygonum bellardii All.; > Polygonum franktonii S.J.Wolf & McNeill. Basionym: Polygonum neglectum Besser 1822
Links to other floras: = Polygonum aviculare ssp. neglectum - FNA5
Show parent genus | Show parent in key(s)
Wetland Indicator Status:
- Atlantic and Gulf Coastal Plain: FAC (taxonomic split from wetland indicator species)
- Eastern Mountains and Piedmont: FACU (taxonomic split from wetland indicator species)
- Great Plains: FACU (taxonomic split from wetland indicator species)
- Midwest: FAC (taxonomic split from wetland indicator species)
- Northcentral & Northeast: FACU (taxonomic split from wetland indicator species)
Hover over a shape, letter, icon, or arrow on the map for definition or see the legend.
© Erik Danielson source | Original Image ⭷
© Erik Danielson source | Original Image ⭷
© Erik Danielson source | Original Image ⭷
© Erik Danielson source | Original Image ⭷Feedback
See something missing or incorrect about Polygonum aviculare ssp. neglectum? Let us know here:
- Please include your name and if possible, email in case when need to clarify what you wrote.
- If you opt out of including email, please be as specific as possible (e.g., which photo is incorrect?)
- Please do not submit questions asking to identify plants or about horticultural topics (e.g., how do I control an invasive plant in my garden?). Instead, those questions can be submitted here for the Carolinas region only.
- Please do not send us feedback about unkeyed species as this work is ongoing.
- Please allow time for flora edits to show in our next data release. We greatly appreciate your feedback but may require extra time to research complicated taxonomic issues.
Horticultural Information
No horticultural data found for this taxon.