Fagus (Beech) habit - large tree (others may be small "scrub oaks")

Fagus (Beech) fruit - "beech nut"

Castanea dentata fruit - "American chestnut"

Quercus variation in leaves among different oak species

Quercus leaves

Quercus (Oak) male catkins

Quercus male flower

Quercus male catkins below, female flowers above in leaf axils

Quercus female flowers (2)

Quercus stem with acorn caps

Quercus fruit - 'acorn'; note many small bracts that make up 'cap'