Young bark=light gray, old bark=darker gray ridged or flaky;  buds=short (3-6 mm) (⅛-¼ in)

buds= pointed or
buds= rounded :

Buds=∩ rounded

trunk bark bud scales can be rubbed off or
trunk bark furrowed by few scales :

Trunk bark bud scales can be rubbed off

young twigs have coarse down   >   post oak Quercus stellata
young twigs smooth, acorns paired on long stalks   >   English oak Quercus robur
acorns not on stalks   >   white oak Quercus alba

Trunk bark furrowed by few scales

twigs=thick hairy, buds=hairy   >   bur oak Quercus macrocarpa
twigs=thick hairy, buds=smooth   >   swamp white oak Quercus bicolor

Small contorted shrubby tree

all buds=short (<3 mm) (<⅛ in)   >   scrub oak Quercus ilicifolia
all buds=long  (>3 mm) (>⅛ in)   >   blackjack oak Quercus marilandica

Learn more about oak genus Quercus

Discover Life Encyclopedia of Life Google Google images Michigan Flora USDA PLANTS db Wikipedia

Uses by native peoples
(Ethnobotany database)