It is a straight tree trunk and gray that can measure up to 30 m tall. Its leaves are of an ovate, ovate-cordate or lanceolate, with primary veins conspicuous and serrated edge. The flowers are unisexual and inconspicuous, greenish.
The ruil grows between 37 º 05 and 37 º 50 'south latitude, in the provinces of Talca and Cauquenes, in an area of about 100 km, but in a total area in 1991 totaled over 3.5 km2 and According to studies, 1998, the species is scattered in 185 people who mostly have 1 or 2 ha and are surrounded by commercial plantations of Pinus radiata (an introduced species), and agricultural croplands and livestock for survival, hindering the expansion of its habitat. The only place where the species is protected by the state is the National Reserve Ruiles created for the express purpose of protecting it.