A Preliminary Check-list of the Algae of Ireland has been produced by Michael D. Guiry (September, 2019).
The preliminary check-list of current names for freshwater, marine and terrestrial (including aerophytic) algae of Ireland is extracted from the distributional data in AlgaeBase as of September 2019, and each name and its source is traceable on-line there. Some 2,879 current species names are presently included. Nine phyla/divisions are included, eight of them from the Eukaryota and one (Cyanobacteria) from the Prokaryota.
National checklists are available for desmids (John, Williamson & Guiry,2011) and seaweeds (Guiry 2012), and for diatoms by Carter in Wolnik & Carer (2014).