sentences:  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.In western Andalusia, other common components of the ecosystem are the areas of common broom, genus "Teline".