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Quercus cualensis is a rare Mexican species of oak in the beech family. It has been found only in a small region in the State of Jalisco in western Mexico, in the mountains south of Puerto Vallarta.
Quercus cualensis is an evergreen tree up to 15 meters tall, with a trunk as much as 30 cm in diameter. Leaves are thin, flat, and hairless, narrowly lance-shaped, up to 15 cm long.