Species Detail - Common Knapweed (Centaurea nigra) - 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).
Black Knapweed, Hardhead
1 January (recorded in 1970)
29 December (recorded in 2018)
Botanical Society of the British Isles, BSBI tetrad data for Ireland, National Biodiversity Data Centre, Ireland, Common Knapweed (Centaurea nigra), accessed 01 June 2020, <https://maps.biodiversityireland.ie/Dataset/9/Species/29714>