Quercus hypophaea is an uncommon species of tree in the beech family Fagaceae. It has been found only in Taiwan.Flora of China, Cyclobalanopsis hypophaea (Hayata) Kudo, 1931. 绒毛青冈 rong mao qing gang It is placed in subgenus Cerris, section Cyclobalanopsis.
Quercus hypophaea is a tree up to 18 meters tall with whitish twigs. Leaves can be as much as 10 cm long.
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line drawings, Flora of China Illustrations vol. 4, fig. 379, drawings 4-7 at right