Quercus longinux
Quercus longinux is an uncommon Asian species of trees in the beech family Fagaceae. It has only been found in Taiwan. It is placed in subgenus Cerris, Quercus [sect. Cyclobalanopsis|section Cyclobalanopsis].
Quercus longinux is a tree. Leaves can be as much as 8 cm long. Acorn is up to 12 mm long, narrower than those of most other species in the subgenus.