Irish checklist:

Checklist developed by the National Botanic Gardens and published on its website.

Number of vascular plant species:

2,328

• Natives: 980
• Natives (apomictic species): 273
• Alien (archeophyte): 111
• Alien (neophyte): 964

Primary sources of distribution data:

• Botanical Society of Britain & Ireland: hectad and tetrad* databases
• Heritage Council of Ireland: Hedgerow Surveys of Ireland*
• Dr. David Thomas Holyoak: Irish vascular plant data 1999-2009*
• Paul R. Green: Irish vascular plant data 2011*
• National Biodiversity Data Centre: Online Atlas of vascular plants 2012-2020*
• Botanical Society of Britain & Ireland: The Flora of County Clare*
• Paul R. Green: The Flora of County Waterford*
• Paul R. Green: The Flora of County Wexford*
• National Botanic Gardens: herbarium & research databases
• National Biodiversity Data Centre:  Species extracted from the National Vegetation Database*
• National Biodiversity Data Centre: Irish Crop Wild Relative Database*
• National Biodiversity Data Centre: Discrete vascular plant surveys*
• National Parks and Wildlife Service: rare and threatened plant database
• Environmental Protection Agency: Q value database & funded research
• Tree Council of Ireland: Heritage Trees of Ireland*
• Botanical Society of Britain & Ireland: Flora of County Clare*

Data is currently being centrally collated by the National Biodiversity Data Centre. *Databases currently accessible through Biodiversity Maps.

National conservation assessment:

• Article 17 reporting – 3 species listed in EU Habitats Directive: NPWS, 2013.The Status of EU Protected Habitats and Species in Ireland. Volume 3, Version 1.0. Unpublished Report, National Parks and Wildlife Serivce. Department of Arts, Heritage and the Gaeltacht, Dublin. Ireland.
• Article 17 reporting – 3 species listed in EU Habitats Directive: NPWS, 2008. The status of EU Protected Habitats and Species in Ireland. NPWS, Department of the Environment, Heritage and Local Government, Dublin.

• T.G.F. Curtis and H.N. McGough, 1988. The Irish Red Data Book: 1. Vascular Plants. Wildlife Service Ireland, The Stationery Office, Dublin.

Monitoring or repeat surveys in place:

• Rare plant surveys (National Parks and Wildlife Service, 1990s, 2000s)

• BSBI Local Change Project: 1987-1988

264 systematically selected tetrads were surveyed in Ireland in 1987-88. This survey has not been repeated since. Rich, T.C.G., Beesley, S. & Goodwillie, R. 2001. Changes in the vascular plant flora of Ireland between pre-1960 and 1987-1988: the BSBI Monitoring Scheme. Irish Naturalists’ Journal 26: 333-350

• Macrophytes are monitored by the EPA through the Water Framework Monitoring Programme

• Intertidal seagrasses are monitored by the EPA through the marine Water Framework Directive (WFD) monitoring programme.