Species Detail - Japanese Knotweed (Fallopia japonica) - Species information displayed is based on the dataset "Irish vascular plant data 1999-2009".

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
25
21
16
13/08/2002
21/06/2006
2 January (recorded in 2018)
30 December (recorded in 2018)
Dr David Thomas Holyoak, Irish vascular plant data 1999-2009, National Biodiversity Data Centre, Ireland, Japanese Knotweed (Fallopia japonica), accessed 21 September 2020, <https://maps.biodiversityireland.ie/Dataset/35/Species/41674>

Records per month (across all datasets)

Records per year (across all datasets)