sentences:  The area occupied by oak forests corresponds above all to the southwest quadrant of the peninsula, but also to Catalonia, Menorca and even the non-coastal valleys of Galicia.They often alternate with the oaks, which occupy the drier slopes and with the "quejigares" of Algerian oak ("Quercus canariensis"), that occupy the ravines and cool, shady northward slopes.The cork oak forests often contain wild olives, and like some of the cool groves, are often accompanied by strawberry trees ("Arbutus unedo") with mock privet ("Phillyrea angustifolia") which grow in the clearings of these forests and dominate their regressive phases.