Wood is often with tyloses. Range extends throughout the Northern Hemisphere. Red and Black Oaks Leaves are deciduous or persistent, usually with bristle-tipped lobes or bristles on margins and occasionally are entire. Fruit generally matures in 2 seasons. The inner surface of the shell is generally tomentose and the seed is generally bitter.
Wood is often without tyloses.
Range is restricted to North America. Groups of Quercus 1. Leaves are more or less deeply lobed - 3 2. Leaves coarsely or sinuately toothed or shallowly lobed or entire - chestnut oaks 3. Eastern species - eastern white oaks 3.