Quercus rex

Quercus rex is an Asian species of tree in the family Fagaceae. It has been found in the seasonal [tropical forest]s of northern Indochina, northeastern India, and also in the province of Yunnan in southwestern China. It is placed in subgenus Cerris, section Cyclobalanopsis.
Quercus rex is a large tree up to 30 m. tall. Twigs are pale brown with a woolly coating of hairs. Leaves can be as much as 270 mm long. The acorn is oblate, 25-35 × 35–50 mm, pale greyish-orange and tomentose when young; the apex is rounded to impressed; the scar is 20–25 mm in diameter and depressed. In China, flowering is in April–May, acorns are found from October–November.