Species Detail - Knotweed (Persicaria) - Species information displayed is based on all datasets.
Terrestrial Map - 10km
Terrestrial Map - 10km
Distribution of the number of records recorded within each 10km grid square (ITM).Marine Map - 50km
Marine Map - 50km
Distribution of the number of records recorded within each 50km grid square (WGS84).
Persicaria
Knotweed
NHMSYS0000461594
RecommendedWell-formed
Aconogonon (Meisn.) Rchb., Aconogonum , Ampelygonum , Ampelygonum Lindl., Bistorta Adans., Bistorta , Persicaria , Pleuropteropyrum , Pleuropteropyrum L. Gross, Rubrivena M. Král, Rubrivena , Truellum , Truellum Houtt.
N/A
N/A
Mill.
Flowering plant
Genus
90
32
20
17/07/2007
17/07/2018
2 July (recorded in 2015)
3 September (recorded in 2014)
National Biodiversity Data Centre, Ireland, Knotweed (Persicaria), accessed 29 June 2025, <https://maps.biodiversityireland.ie/Species/43863>