© JR Crellin, www.floralimages.co.uk; http://creativecommons.org/licenses/by-nc-nd/3.0/
© JR Crellin, www.floralimages.co.uk; http://creativecommons.org/licenses/by-nc-nd/3.0/
Adapted with permission from An Irish Flora, Webb D. A. et al 1996