Pteridium aquilinum
Some ranges have forested patches, consisting mainly of "Pinus pinaster", "Pinus sylvestris" and "Pinus uncinata" pines and "Quercus rotundifolia", "Quercus pyrenaica" and "Quercus faginea" oaks, even "Fagus sylvatica" beeches and "Betula pendula" birches grow in some humid slopes, where "Pteridium aquilinum", "Polypodium vulgare" ferns may also be found.