Quercus potosinaQuercus potosina is a species of oak. It is native to northern Mexico, from Chihuahua, Durango, and Jalisco east as far as San Luis Potosí. It is placed in Quercus section Quercus.DescriptionQuercus potosina is a shrub or small tree up to tall, and is drought-deciduous. The leaves are round or egg-shaped, up to long, with numerous small pointed teeth along the edges.