Quercus serrata

Quercus serrata, the jolcham oak (, Japanese: ), is an East Asian species of tree in the beech family. It is native to China, Taiwan, Japan, and Korea.

Description
Quercus serrata is a deciduous oak tree reaching a height of 25 m occupying elevations from 100 - 2000 m. The bark is gray or reddish-brown with longitudinal furrows. The leaves are up to 17 cm long by 9 cm wide, leathery, elliptical in shape, with serrated margins; they are densely covered with trichomes when young, becoming glabrous with age. The petioles are short (3 cm). The flowers are pistillate inflorescences from 1.5 - 3 cm long, occurring in March to April. The seeds are oval-shaped acorns 1.7 - 2 cm long and take one year to mature. A cup with trichomes and triangular shaped scales covers 1⁄4 to 1⁄3 of the acorn.

The plant frequently attracts stinkbugs which lay their eggs inside them.