Species Detail - Japanese Knotweed (Fallopia japonica) - Species information displayed is based on all datasets.

Terrestrial Map - 10km

Distribution of the number of records recorded within each 10km grid square (ITM).
Live Map

Marine Map - 50km

Distribution of the number of records recorded within each 50km grid square (WGS84).
Live Map

Species image

Fallopia japonica
Japanese Knotweed
Fallopia japonica var. compacta, Fallopia japonica var. japonica, Polygonum compactum, Polygonum compactum, Polygonum cuspidatum, Reynoutria japonica, Reynoutria japonica var. compacta, Reynoutria japonica var. compacta
Invasive Species: Invasive Species || Invasive Species: Invasive Species >> High Impact Invasive Species || Invasive Species: Invasive Species >> Regulation S.I. 477 (Ireland)
fajap
(Houtt.) Ronse Decr.
flowering plant
Species
6847
742
131
01/01/1600
31/05/2021
2 January (recorded in 2018)
31 December (recorded in 2020)
National Biodiversity Data Centre, Ireland, Japanese Knotweed (Fallopia japonica), accessed 25 October 2021, <https://maps.biodiversityireland.ie/Species/41674>

Records per month (across all datasets)

Records per year (across all datasets)