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

5 results for Reynoutria japonica (Itadori knotweed)
Download Data

Specimen IDStateCountyLocalityYear HUC Number What's this? Drainage nameStatus
1660271 CTHartfordNorthwest Park1998 01080207 Farmington Riverunknown
1661497 CTNew LondonGroton1998 01100003 Thamesunknown
1661798 CTWindhamNorth Windham, Windham1998 01100002 Shetucket Riverunknown
1669334 ILDuPagePark Blvd., Southminster Presbyterian church. The Morton Arboretum, Lisle.1998 07120004 Des Plainesunknown
1669219 NYUlsterNear village of Kerhonkson on County Rd 27 which lies parallel to Stony Kill, ca 0.5mi E of Rt 44-551998 02020007 Rondoutunknown

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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