Habit: this deciduous tree grows slowly. Generally short and straight with a rounded crown and many bent and twisted branches. Bark is gray and furrowed in what appears to be a pattern of small squares. The blue-green leaves are waxy, thick and 1-3 in (2.5-8 cm) long with shallow rounded lobes, undersides much paler than the topside. It may retain its leaves year-round in moist sites. Flowers are inconspicuous and fruit is an elongated acorn with a prominent tip. Leaves turn a yellow orange color in the autumn.
Ecology: endemic to California, blue oak grows in the foothills of the Sierra Nevada, on dry rocky slopes in woodlands and savannas usually under 3500 ft (1000 m).
Growing Conditions: full sun, doesn’t mind poor soils, very drought tolerant once established.
A very important species to Native American cultures.