Species Detail - Giant Knotweed (Fallopia sachalinensis) - Species information displayed is based on the dataset "The Flora of County Waterford".
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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Fallopia sachalinensis
Giant Knotweed
NHMSYS0000458719
RecommendedWell-formed
Fallopia sachalinensis (F.Schmidt ex Maxim.) Ronse Decraene, Polygonum sachalinense F.Schmidt., Polygonum sachalinense F. Schmidt, Polygonum sachalinensis F.Schmidt ex Maxim., Polygonum vivax nom. inval. J. Schmitz & Strank, Reynoutria sachalinensis (F. Schmidt) Nakai, Reynoutria sachalinensis (F.Schmidt ex Maxim.) Nakai, Reynoutria vivax J. Schmitz & Strank, Reynoutria vivax J.Schmitz & Strank
Invasive Species: EU Invasive Alien Species Regulation No. 1143/2014 || Invasive Species: Regulation S.I. 477/2011 (Ireland) || Invasive Species: High Risk Invasive Species (2013 Report) || Invasive Species: Regulation S.I. 374/2024 (Ireland) || Invasive Species: The Wildlife (Northern Ireland) Order 1985
fasac
(F. Schmidt) Ronse Decr.
Flowering plant
Species
16
4
1
24/08/1974
02/10/2012
1 April (recorded in 2009)
1 December (recorded in 2017)
Paul R Green, The Flora of County Waterford, National Biodiversity Data Centre, Ireland, Giant Knotweed (Fallopia sachalinensis), accessed 20 August 2025, <https://maps.biodiversityireland.ie/Dataset/23/Species/41677>