Calorific value, flammability and chemical composition during the seasons of the year for the different forest species which make up the woodland map of two zones, Devesa da Rogueira (continental high mountainous zone) and As Neves (humid atlantic zone), situated in Galicia (Spain), are reported. The species characteristic of the zones are: Sorbus aucuparia L., Acer pseudoplatanus L., Taxus baccata L., Fagus sylvatica L., Quercus robur L. and Castanea sativa Miller. in Devesa da Rogueira (Orense), and: Alnus glutinosa (L.) Gaertner., Betula celtiberica L., Prunus avium (L.) L., Fraxinus excelsior L., Laurus nobilis L. and Salix Atrocinera L., in As Neves (La Coruna). The calorific values were measured by static bomb calorimetry and the flammability using a method proposed by Valette.