Beech and the species "F. okamotoi", proposed by the botanist Chung-Fu Shen in 1992, comprise this subgenus. The better known "Fagus" subgenus beeches are high-branching with tall, stout trunks and smooth silver-grey bark. This group includes "Fagus sylvatica", "Fagus grandifolia", "Fagus crenata", "Fagus lucida", "Fagus longipetiolata", and "Fagus hayatae". The classification of the European beech, "Fagus sylvatica" is complex, with a variety of different names proposed for different species and subspecies within this region (for example "Fagus taurica", "Fagus orientalis", and "Fagus moesica"). Research suggests that beeches in Eurasia differentiated fairly late in evolutionary history, during the Miocene. The populations in
Hylorina sylvatica Hylorina sylvatica Hylorina sylvatica (also known as the Emerald forest frog, or in Spanish, sapo arboreo) is a species of frog in the family Batrachylidae. It is monotypic within the genus Hylorina. It is found in Argentina and Chile. This species is endemic to the austral "Nothofagus" forests of Chile and Argentina with a narrow distribution along the eastern slopes of the Andes. Male "Hylorina sylvatica" grow to snout-vent length of and females to . They are emerald-green during the day while they turn dark green at night. Adults can be found in permanent and temporary pools, swamps, and marshes.