The red oak (Quercus rubra) is a tall tree (80 ft) with straight trunk and full canopy. The leaves, deciduous and alternatively placed, are oblong with U-shaped notches which extend halfway to the midrib. The leaves turn a beautiful red in autumn. The twigs are reddish-brown and without hairs while the terminal buds are covered by numerous red-brown hairy scales. The acorns are 1- to 2-inches long enclosed only at the base by a flat, thin, saucer-shaped cup (distinguishing it from the bowl-like cup of the black oak). The bark of mature trees is brown to nearly black and broken into wide flat-topped corrugated ridges; the inner bark is reddish. The red oak is the most important timber tree of all the oaks and is native to North America. It is New Jersey’s state tree.