Which tree family includes oaks, beeches, and chestnuts?

Which tree family includes oaks, beeches, and chestnuts? The answer is Fagaceae.

Fagaceae is the beech family, a flowering-plant family that includes the familiar genera Quercus (oaks), Fagus (beeches), and Castanea (chestnuts). These trees are chiefly associated with temperate and subtropical forests across the Northern Hemisphere, although some members extend into tropical regions.

Many Fagaceae produce nuts enclosed in distinctive cup-like structures. Acorns are the best-known example: each is a Quercus fruit partly surrounded by a cupule. Chestnuts are enclosed in spiny husks, while beeches produce small triangular nuts in bristly husks.

The family is economically and ecologically important. Oaks support large numbers of insects and other wildlife, provide durable timber, and often dominate forests. Beech and chestnut trees are also major timber species, while their seeds feed birds, mammals, and people.

Fagaceae belongs to the order Fagales. A common classification mistake is placing oaks with legumes because of their acorns; Fabaceae is the pea and bean family, not the oak family.