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*Reynoutria sachalinensis (F. Schmidt ex Maximowicz) Nakai. Giant Knotweed, Sachaline. Phen: Jul-Aug; Aug-Oct. Hab: Disturbed areas, roadsides. Dist: Native of e. Asia.

Origin/Endemic status: E. and se. Asia

Synonymy ⓘ: = Il, K3, K4, NY, Va, Desjardins et al (2023); = Fallopia sachalinensis (F.Schmidt ex Maxim.) Ronse Decr. – FNA5, Mi, NE, Pa, Tn, Ronse De Craene & Akeroyd (1988); = Polygonum sachalinense F.Schmidt ex Maxim. – C, F, GrPl, K1, RAB, Tat, W, WV, Horton (1972), Mitchell & Dean (1978)

Links to other floras: = Fallopia sachalinensis - FNA5

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Wetland Indicator Status:

  • Atlantic and Gulf Coastal Plain: UPL
  • Eastern Mountains and Piedmont: UPL
  • Great Plains: UPL
  • Midwest: UPL
  • Northcentral & Northeast: UPL

Heliophily ⓘ: 6

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image of plant© Radford, Ahles and Bell | Original Image ⭷

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See something wrong or missing on about Reynoutria sachalinensis? Let us know here: (Please include your name and email if at all complicated so we can clarify if needed.) We greatly appreciate feedback, and will include updates from you in our next webapp update, which can take a few months.