Though Sierra del Sueve manifests a high degree of deforestation, it retains some remnants of forest. La Biescona is a beech forest in the northern area of the range close to the coast where there are clumps of chestnut trees and the remains of pine and eucalyptus reforestation, scattered between areas of shrubland and meadows. The most notable forested area is at the northern end where the trees are clumped and dominated by holly groves and espinera while also containing other species such as ash, beech, birch, elm, hazel, maple, yew, Wild Pear and brush.