Japanese Knotweed (Fallopia japonica) - Detail

Species Detail - Japanese Knotweed (Fallopia japonica) - Species information displayed is based on the dataset "The Flora of County Waterford".

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

Scientific Name Fallopia japonica

Common Name Japanese Knotweed

Synonyms Fallopia japonica var. compacta, Fallopia japonica var. japonica, Polygonum compactum, Polygonum compactum, Polygonum cuspidatum, Reynoutria japonica, Reynoutria japonica var. compacta, Reynoutria japonica var. compacta

Designations Invasive Species: Invasive Species || Invasive Species: Invasive Species >> High Impact Invasive Species || Invasive Species: Invasive Species >> Regulation S.I. 477 (Ireland)

Abbreviation fajap

Authority (Houtt.) Ronse Decr.

Group flowering plant

Rank Species

Number Of Records 329

Number Of 10Km Squares 33

Number Of 50Km Squares 8

Oldest Record 01/01/1940

Newest Record 02/10/2012

Phenology - earliest record (across all datasets) 2 January (recorded in 2018)

Phenology - latest record (across all datasets) 31 December (recorded in 2020)

Species Profiles

Citation Paul R Green, The Flora of County Waterford, National Biodiversity Data Centre, Ireland, Japanese Knotweed (Fallopia japonica), accessed 19 April 2024, <https://maps.biodiversityireland.ie/Dataset/23/Species/41674>

Species Detail - Japanese Knotweed (Fallopia japonica) - Species information displayed is based on the dataset "The Flora of County Waterford".

Terrestrial Map - 10km

Marine Map - 50km

Species image

Records per month (across all datasets)

Records per year (across all datasets)