Chrysanthemum coronarium came to my mind, however, members of the Asteraceae family are pretty hard to identify just by their flowers, so I would just refer to it as another case of DYC. May you have more pictures about this plant? Seeing the foliage would help a lot.
Coleostephus myconis? http://es.wikipedia.org/wiki/Coleostephus_myconis I agree with Axel, more info could help.