Species Detail - Himalayan Knotweed (Persicaria wallichii) - 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

Persicaria wallichii
Himalayan Knotweed
Aconogonon polystachyum, Aconogonum polystachyum, Persicaria polystachya non Opiz, Persicaria polystachya non Opiz, Pleuropteropyrum polystachyum, Polygonum polystachyum, Rubrivena polystachya
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
20
3
2
01/01/1950
22/03/2014
22 March (recorded in 2014)
25 November (recorded in 2013)
Paul R Green, The Flora of County Waterford, National Biodiversity Data Centre, Ireland, Himalayan Knotweed (Persicaria wallichii), accessed 22 September 2020, <https://maps.biodiversityireland.ie/Dataset/23/Species/29165>

Records per month (across all datasets)

Records per year (across all datasets)