Species Detail - Himalayan Knotweed (Persicaria wallichii) - 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)._0.jpg)
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Persicaria wallichii
Himalayan Knotweed
NBNSYS0000003765
UnverifiedUnverified
Aconogonon polystachyum (Wall. ex Meisn.) M. Král, Aconogonum polystachyum (Wall. ex Meisn.) M.Král, Persicaria polystachya non Opiz (Wallich ex Meissner) Gross, Persicaria polystachya non Opiz (Wall. ex Meisn.) H. Gross, Pleuropteropyrum polystachyum (Wall. ex Meisn.) Javeid & Munshi, Polygonum polystachyum Wall. ex Meisn., Rubrivena polystachya (Wall. ex Meisn.) M. Král
Invasive Species: Invasive Species || Invasive Species: Invasive Species >> Medium Impact Invasive Species || Invasive Species: Invasive Species >> Regulation S.I. 477 (Ireland)
pewal
Greuter & Burdet
flowering plant
Species
421
169
80
01/01/1930
15/11/2024
22 March (recorded in 2014)
25 November (recorded in 2013)
National Biodiversity Data Centre, Ireland, Himalayan Knotweed (Persicaria wallichii), accessed 13 April 2025, <https://maps.biodiversityireland.ie/Species/29165>