Déirdre de Búrca Resigns Quit gormley Green senator
From the 2009 European Election Campaign a Newsletter from Green Party candidate Deirdre De Burca. She failed to be elected.
Also in the leaflet is a picture of her with John Gormley, Trevor Sargent and Joe Corr.
Each Green Party local election candidate is also pictured.
Senator Déirdre de Búrca has since resigned from the Senate.
Irish Election Literature 
As far as I know, Deirdre resigned from the Senate (and thus the parliamentary party) but is still a member of the Green Party.
Thanks…. post updated.