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
Stigmella hemargyrella Stigmella hemargyrella Stigmella hemargyrella is a moth of the Nepticulidae family. It is found in most of Europe, except Iceland, Norway, Finland, Portugal and most of the Baltic region. The moths (imago) are bivoltine flying from April to May and again from July to August and can be found resting on trunks. The wingspan is 5–6 mm. The egg can be laid on either side of the leaf and the pale yellowish-white larva feed, within a mine on "Fagus sylvatica" and "Fagus sylvatica orientalis". The mine is a sinuous gallery and at the early state is relatively narrow with a