Drier, dense formations of sandy soils at the foot of dunes, or between dunes and lagoons of the Mediterranean and thermo-Atlantic coasts of Europe and North Africa, and of the endoreic (closed drainage) interior basins of Mediterranean Iberia, with Plantago crassifolia, Schoenus nigricans, Juncus littoralis, Spartina versicolor (Spartina patens, Spartina juncea), Elymus elongatus, Inula crithmoides, all of which may dominate and form physiognomically distinct, sometimes almost monospecific, facies.