Leather Oak - Quercus durata var. durata
Often a shrub but also a tree to 15 feet or so in good habitat, this western oak is evergreen. Variety durata grows from the lowlands to about 4,500 feet of altitude in the coastal ranges of northern California as far east as the Sierra Nevada and in the San Francisco area as well. It grows on serpentine soils in chaparral habitat. The twigs are hairy when young, and the short, leathery leaves are toothed, hairy beneath when young, and rolled under along the margins. The acorns are oval or cylindrical, and the cup is bowl-shaped and the scales are bumpy.