Malus sylvestris
Shale dominates the landscape but there are also limestone stains in plateau areas and granite in the Montesinho mountain range. Native trees include "Prunus avium", "Ulmus minor", "Corylus avellana", "Malus sylvestris", "Quercus pyrenaica", among others. It is the only place in Portugal where "Euonymus europaeus" can be found naturally.