National Biodiversity Data Centre
The distribution maps in the web version of the Flora of County Waterford may differ from those in the hard copy publication. Within individual species pages on the Flora of Waterford website a static map is used to quickly indicate the distribution of the species. This map is based on records that have a grid reference capable of being displayed at the tetrad scale (a square 2km x 2km). Clicking on the static tetrad distribution map will bring the user to a live version of the map on the National Biodiversity Data Centre’s web GIS mapping system. On this system all records for the species within Paul Green’s Flora of County Waterford database will be visible (e.g., 10km square records can now be viewed). 
The National Biodiversity Data Centre uses the National Botanic Gardens checklist of vascular plants 2008. Only species present on this checklist will be displayed through the Centre’s web GIS mapping system.
Paul Green
In Paul Green’s hardcopy flora of County Waterford, the nomenclature follows that of the New flora of the British Isles (Stace, 1997) and species not included in Stace’s flora follow nomenclature of a number of different publications such as A catalogue of alien plants in Ireland (Reynolds, 2002) and Flora of Great Britain and Ireland volume 4 and 5 (Sell and Murrell, 1996 and 2006). For a small number of varieties the authorities could not be traced. 
Many pre-1987 records state only that a plant grew in the county or give a 10km square grid reference. Information is included in the text for these records. In some instances a four figure grid reference has been given to those records where the record is accompanied by a named location. Consequently the grid references given for pre-1987 records should only be considered as approximations. The maps show the presence of a species but do not give any indication of abundance. A square, circle or cross on a map may represent one individual plant or thousands. Consequently, care must be taken in interpretation.
The views expressed in the text are entirely my own.
The word ‘native’ has been assigned to all species in the text believed to be native to the county. All other species are believed to be non-native (alien) to Co. Waterford. Census Catalogue of the Flora of Ireland (Scannell and Synnott, 1987), A catalogue of alien plants in Ireland (Reynolds, 2002) and the New Atlas of the British and Irish Flora (Preston, Pearman and Dines, 2002) gives the status of these species.
The word ‘Ireland’ used in the text refers to the whole of the island.
Planted trees have not normally been counted during this survey of the county. Where they have been recorded they are normally growing in wild places or are on the sites of ruins. The text for each species hopefully makes it clear which records refer to planted trees and which to self-sown.
First record – this is the earliest dated record for each species, subspecies, variety I have been able to trace.
Dates in text – are the first traced record for the site, if only one date then species not reported at site since. The last date is the most modern sighting of the species at the site. With exception where the first sighting was made after 2000 and then only first date is given.
Before 1866 – the record was made before that date but it is not clear when it was found. The record was published in a paper/book for that year.
Extinct – is applied to all species that have not been seen growing in the county since 1996.
Error – is applied to all records that I believe to be errors.
The word ‘arable’ only refers to fields of barley and wheat crops. Other crops are always mentioned in the text.
Left bank – with the flow of the river.                            
Right bank – with the flow of the river.
Whole tetrad(s) – refers to tetrads that are completely covered by land that are within the county.
R, S, W, X letters on the distribution maps – these are the letters assigned to each 100km square of the national grid. These letters are only placed on the maps where all four can be displayed.
Places names – these have been taken from Ordnance Survey of Ireland, Discovery Series, 1:50,000 for records made since 1997. Other records have been given the place name that is published with the record.