A genus of ten species of deciduous trees (commonly known as Beech) in the family Fagaceae, native to temperate Europe, Asia and North America.
The leaves of beech trees are entire or sparsely toothed, from 5–15 cm long and 4–10 cm broad. The flowers are small single-sex (monoecious), the female flowers borne in pairs, the male flowers wind-pollinated catkins, produced in spring shortly after the new leaves appear. The bark is smooth and light gray. The fruit is a small, sharply three–angled nut 10–15 mm long, borne singly or in pairs in soft-spined husks 1.5–2.5 cm long, known as cupules. The nuts are edible, though bitter (though not nearly as bitter as acorns) with a high tannin content, and are called beechmast. Most beeches have green leaves, but some are red, the fagus silvatica.
