Reynoutria japonica
(Itadori knotweed)
Plants
Exotic
Collection Info
Point Map
Species Profile
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Impacts

32 results for Reynoutria japonica (Itadori knotweed)
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Click here for listing in all states

Page:12
Specimen IDStateCountyLocalityYear HUC Number What's this? Drainage nameStatus
1669427 NYBronxBronx1946 02030102 Bronxunknown
1669458 NYBronxBronx Park North, in the Bronx River Forest, north of Mosholu Parkway and west of the Bronx River2016 02030102 Bronxunknown
1660069 NYBronxPort Morris1900 02030102 Bronxunknown
1863584 NYBroomeChenango Bridge, NY2020 02050102 Chenangoestablished
1863581 NYCortlandCincinnatus, NY2020 02050102 Chenangoestablished
1863580 NYCortlandLabrador Hollow2020 02050102 Chenangoestablished
1699989 NYDelaware[No locality description provided]2020 02040101 Upper Delaware 
1660142 NYKingsWilliamsburg1990 02030101 Lower Hudsonunknown
1669144 NYNew YorkCentral Park2006 02030101 Lower Hudsonunknown
1669264 NYNew YorkCentral Park2006 02030101 Lower Hudsonunknown
1669304 NYNew YorkCentral Park, Mount, between 105th and 106th Sts and between 5th and 6th Aves2014 02030101 Lower Hudsonunknown
1669275 NYNew YorkCentral Park, Northwest Corner, between 109 and 110th Streets and between 7th and 8th Avenues2016 02030101 Lower Hudsonunknown
1667190 NYNew YorkCentral Park, Northwest Corner, between 109 and 110th Streets and between 7th and 8th Avenues2016 02030101 Lower Hudsonunknown
1863583 NYOnondagaCards Corners, NY2020 04140201 Senecaestablished
1863577 NYOnondagaGreen Lakes2020 04140202 Oneidaestablished
1863588 NYOnondagaJamesville Beach County Park2020 04140202 Oneidaestablished
1863587 NYOnondagaJamesville, NY2020 04140202 Oneidaestablished
1863578 NYOnondagaManilus2020 04140202 Oneidaestablished
1863582 NYOnondagaNewdrow, NY2020 04140201 Senecaestablished
1863579 NYOnondagaPompey, NY2020 02050102 Chenangoestablished
1863576 NYOnondagaRoadside, Ostrom Avenue, Syracuse, NY2020 04140201 Senecaestablished
1863585 NYOnondagaSyracuse, NY2020 04140201 Senecaestablished
1863586 NYOnondagaSyracuse, NY2020 04140201 Senecaestablished
1660247 NYSaratogaSaratoga National Historical Park2001 02020003 Hudson-Hoosicunknown
1661781 NYSt. LawrenceWiley Dondero Canal1970 04290008 Raisin River-St. Lawrence Riverunknown
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Data Disclaimer: Number of records does not imply species abundance. This summary represent collection records only and may not reflect the actual distribution of established populations. These data are preliminary or provisional and are subject to revision. They are being provided to meet the need for timely best science. The data have not received final approval by the U.S. Geological Survey (USGS) and are provided on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from the authorized or unauthorized use of the data.

Disclaimer:

The data represented on this site vary in accuracy, scale, completeness, extent of coverage and origin. It is the user's responsibility to use these data consistent with their intended purpose and within stated limitations. We highly recommend reviewing metadata files prior to interpreting these data.

Citation information: U.S. Geological Survey. [2026]. Nonindigenous Aquatic Species Database. Gainesville, Florida. Accessed [1/22/2026].

Contact us if you are using data from this site for a publication to make sure the data are being used appropriately and for potential co-authorship if warranted.

For general information and questions about the database, contact Wesley Daniel. For problems and technical issues, contact Matthew Neilson.