Quercus aliena

Quercus aliena, the galcham oak or oriental white oak, is a species of oak in the family Fagaceae, in the white oak section "Quercus".
Description.
It is a deciduous tree growing to tall with a trunk up to diameter with fissured grey-brown bark. The leaves are obovate to oblong, glabrous above, glabrous to densely grey-white hairy below, mostly long and wide (rarely up to long and wide), with 9 to 15 lobes on each side, and a petiole.
The flowers monecious catkins. The acorns are long and wide, a third to a half enclosed in a green-grey cup on a short peduncle; they are solitary or 2–3 together, and mature in about six months from pollination. A long-lived tree, it is slow-growing.
Distribution and taxonomy.
It is native to East Asian states of Korea, Japan (where it occurs in Honshu, Shikoku, and Kyushu), mainland China (where it occurs in the provinces of Anhui, Gansu, Guangdong, Guangxi, Guizhou, Hebei, Henan, Hubei, Hunan, Jiangsu, Jiangxi, Liaoning, Shaanxi, Shandong, Shanxi, Sichuan, Yunnan, and Zhejiang) and Taiwan.
Three to five varieties are accepted:
Hybrids between "Quercus aliena" and several other oaks in "Quercus" sect. "Quercus" are known.
Common names.
In China it is called ruìchí húlì, or húlì. "Quercus aliena" var. "acutiserrata" is referred to as ruìchí húlì, while var. "aliena" is referred to as húlì. In Japan it is called naragashiwa.
Cultivation and uses.
The wood is used in East Asia for boat building and wood flooring for houses. The seeds can be crushed into a powder and used as a soup thickener and for mixing into cereals and breads. The seeds when roasted can also be used as a substitute for coffee. Galls produced by the larvae of insects are a rich source of tannin.
"Quercus aliena" was introduced to Europe in 1908, but remains rare in cultivation outside of its native area. The taproot is deep, making older plants difficult to move. It grows in full sun or partial shade and tolerates strong winds. It can grow in almost any type of soil as long as not waterlogged.