Polygonum polystachyum Wall. ex Meisn.
cultivated knotweed
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Images:
Polygonum polystachyum Wall. ex Meisn.
See all the Polygonum thumbnails at the PLANTS Gallery
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Synonyms:
Polygonum polystachyum Wall. ex Meisn.
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ACPO7 |
Aconogonum polystachyum (Wall. ex Meisn.) H. Haraldson |
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Distribution:
Polygonum polystachyum Wall. ex Meisn.
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See U.S. county distributions (when available) by clicking on the map or the linked states below:
USA (CA, MA, MT, OR, WA), CAN (BC, NS), FRA (SPM) |
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Related Taxa:
Polygonum polystachyum Wall. ex Meisn.
View
33 genera in Polygonaceae,
80 species in Polygonum
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Classification:
Polygonum polystachyum Wall. ex Meisn.
Click on a scientific name below to expand it in the PLANTS
Classification Report.
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Noxious Weed Information:
Polygonum polystachyum Wall. ex Meisn.
This plant is listed by the U.S. federal government or a state. Common names are from state and federal lists. Click on a place
name to get a complete noxious weed list for that location,
or click here for a composite list of all
Federal and State Noxious Weeds.
California: |
Himalayan knotweed |
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B list (noxious weeds) |
Oregon: |
Himalayan knotweed |
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"B" designated weed |
Himalayan knotweed |
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Quarantine |
Washington: |
Himalayan knotweed |
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Class B noxious weed |
Himalayan knotweed |
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Noxious weed seed and plant quarantine |
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U.S. Weed Information:
Polygonum polystachyum Wall. ex Meisn.
Himalyan knotweed
This plant can be weedy or invasive according to the authoritative sources noted below. This plant
may be known by one or more common names in different
places, and some are listed above. Click on an acronym
to view each weed list, or click here for a
composite list of Weeds of the U.S.
STATE |
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Assorted authors.
200_.
State noxious weed lists for 46 states.
State agriculture or natural resource departments.
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Introduced Information:
Polygonum polystachyum Wall. ex Meisn.
This plant is introduced to some part of the PLANTS
Floristic Area, though it may be native in other parts. Click on
link below for a partial or complete list of PFA introduced plants.
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Wetland Indicator Status:
Polygonum polystachyum Wall. ex Meisn.
Nat. Ind. |
Reg. 1 |
Reg. 2 |
Reg. 3 |
Reg. 4 |
Reg. 5 |
Reg. 6 |
Reg. 7 |
Reg. 8 |
Reg. 9 |
Reg. 0 |
Reg. A |
Reg. C |
Reg. H |
FAC |
NI |
NO |
NO |
NO |
NO |
NO |
NO |
NO |
FAC |
FAC* |
NO |
NO |
NO |
Interpreting Wetland Indicator Status
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More Accounts and Images:
Polygonum polystachyum Wall. ex Meisn.
View photographs from CalPhotos.
View species account from ARS Germplasm Resources Information Network (GRIN).
View taxonomic account from Integrated Taxonomic Information System (ITIS) for ITIS Taxonomic Serial Number 20919.
View species account and distribution map from Jepson Interchange (University of California - Berkeley).
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