Species Detail - Ray's Knotgrass (Polygonum oxyspermum) - Species information displayed is based on the dataset "BSBI tetrad data for Ireland".
Terrestrial Map - 10kmDistribution of the number of records recorded within each 10km grid square (ITM).
Marine Map - 50kmDistribution of the number of records recorded within each 50km grid square (WGS84).
C.A. Mey. & Bunge
7 June (recorded in 2005)
23 October (recorded in 2016)
Botanical Society of the British Isles, BSBI tetrad data for Ireland, National Biodiversity Data Centre, Ireland, Ray's Knotgrass (Polygonum oxyspermum), accessed 04 April 2020, <https://maps.biodiversityireland.ie/Dataset/9/Species/44054>