sentences:  The forest has abundant moss and lichens, but very few shrubs and herbaceous plants.In all cases, Spanish fir occupies high mountain zones (such as the Sierra de las Nieves, Sierra Bermeja, and Sierra de Grazalema).Forests of Holm oak ("Quercus ilex") form natural forests in most of the Mediterranean region as well as penetrating into the warmer sun-exposed areas and hillsides of the Atlantic region; they extend from sea level, with the subspecies "ilex", to an altitude of 1400 metres, in some mountains and high plains of the interior; in the continental zone, the oak found is the subspecies "rotundifolia", more resistant to such a climate.