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

17 results for Reynoutria japonica (Itadori knotweed)
Download Data

Specimen IDStateCountyLocalityYear HUC Number What's this? Drainage nameStatus
1692041 MILivingstonLake Chemung2020 04080203 Shiawasseeunknown
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 
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
1694351 OHCuyahogaOhio and Erie Canal2020 04110002 Cuyahogaunknown
1728088 ORLane[No locality description provided]2020 17090003 Upper Willamette 

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.

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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 [2/23/2026].

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