The Portuguese areas of the Juresian Sector (sensu Rivas-Martínez et al., Itinera Geobotanica, 2002) include a considerable diversity of deciduous woodlands predominated by the Iberian birch (Betula celtiberica). In a recent study of the vegetation of the Peneda-Gerês mountain range (Honrado, Flora e Vegetação do Parque Nacional da Peneda-Gerês, 2003), six different birch-woodland types were recognised and classified according to both dynamic (climactic vs. secondary/ /seral formations) and synecologic (climatophilous vs. edapho-hygrophilous formations) characters. In the same study, riparian birch woodlands of the Juresian Sector were preliminarily described as a new association (Carici reuterianae-Betuletum celtibericae).
