Species Detail - Greater Duckweed (Spirodela polyrhiza) - Species information displayed is based on the dataset "BSBI tetrad data for Ireland".

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
Spirodela polyrhiza
Greater Duckweed
Great Duckweed, Lemna polyrhiza
N/A
sppol
(L.) Schleid.
flowering plant
Species
246
58
25
01/01/1930
31/12/2010
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>

Records per month (across all datasets)

Records per year (across all datasets)