Euphrasia alpina Alpine Eyebright
This is only a tentative identification because Eyebrights are notoriously hard to identify with certainty. However Euphrasia alpina does grow in these mountains and has purple tinged flowers which look very much like this. The leaves are also very similar to those of E. alpina.
Hills opposite Gèdre, French Pyrenees, 13th June 2009
Added on December 8th 2009, updated 30th March 2010