Quercus serrata, the jolcham oak[1] (Japanese:),[2] is an East Asian species of tree in the beech family. It is native to China, Taiwan, Japan, and Korea.[3]
Quercus serrata is a deciduous oak tree reaching a height of 25m (82feet) occupying elevations from 100m-2000mm (300feet-7,000feetm). The bark is gray or reddish-brown with longitudinal furrows. The leaves are up to 17cm (07inches) long by 9cm (04inches) 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- long, occurring in March to April. The seeds are oval-shaped acorns 1.7- long and take one year to mature. A cup with trichomes and triangular shaped scales covers to of the acorn.
The plant frequently attracts stinkbugs which lay their eggs inside them.[4]