Species Detail - Greater Duckweed (Spirodela polyrhiza) - 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).
Great Duckweed, Lemna polyrhiza
21 May (recorded in 2011)
29 September (recorded in 2015)
Botanical Society of the British Isles, BSBI tetrad data for Ireland, National Biodiversity Data Centre, Ireland, Greater Duckweed (Spirodela polyrhiza), accessed 15 July 2020, <https://maps.biodiversityireland.ie/Dataset/9/Species/45466>