Literature
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- Jebb, H. P. (unpubl.) Red Data Book 2006, from the Proposed Red Data List of Vascular Plants in Ireland (rcdoct2005.xls) from: http://www.botanicgardens.ie/gspc/news/news.htm. .
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- Webb, D. A. and M. J. P. Scannell ( 1983. ) Flora of Connemara and the Burren. Royal Dublin Society and Cambridge University Press, Cambridge, UK.
- Webb, D. A., J. Parnell and D. Doogue ( 1996. ) An Irish Flora. Dundalgan Press, Dundalk.