Quercus graciliformis (also known as the Chisos oak or slender oak) is a rare North American species of oak tree.
Description Quercus graciliformis is a deciduous tree up to tall. The leaves are elliptical or lance-shaped with 8–10 shallow lobes. The acorns are produced biennially.
Distribution The species has been found only in the Chisos Mountains, within Big Bend National Park of West Texas. It may also be native the state of Coahuila in northeast Mexico.Texas A&M University It is threatened by habitat loss.
It grows on dry, rocky canyon floors at elevations above .
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