Open scrub formed by Stauracanthus genistoides ssp. genistoides, Halimium halimifolium, Halimium commutatum or Cistus libanotis (Cistus bourgaeanus), highly adapted to the extreme aridity and oligotrophy of fossil dunes and other deep, fixed sands with very low water table of coastal areas of the western Mediterranean basin and the subtropical Atlantic, particularly developed in the southwestern Iberian peninsula.