The mystical blue oak is a medium-size, deciduous tree endemic to california, where it grows mainly in the foothills of the central part of the state. Blue oaks feature a rounded, somewhat irregular crown, and can grow to heights of up to 70 feet tall, but are usually closer to 50 feet tall. The trunk is usually singular, and seldom more than 2 feet in diameter. The bark is thin and flaky. The canopy is compact, round, and supported by many crooked branches. Quercus douglasii takes its name from the blue-green color of its shallowly-lobed, thick and waxy leaves. Blue oaks grow in a mediterranean climate, with hot, dry summers and cool, wet winters. In summer, midday temperatures in blue oak woodlands can exceed 100 °f (38 °c) for weeks at a time. The blue oak prefers drier sites and is extremely drought and heat tolerant – it is the most drought tolerant of california’s deciduous oaks. Generally, blue oaks live for several hundred years. The oldest known blue oak, in sequoia national park, is about 400 years old. Historically, this species has been highly valued by california indian peoples who relied on this tree species for food, medicine, dyes, utensils, games, toys, basketry, and construction materials.The item “BLUE OAK (medium)” is in sale since Wednesday, February 27, 2013. This item is in the category “Home & Garden\Yard, Garden & Outdoor Living\Flowers, Trees & Plants\Trees\Evergreen”. The seller is “jonsteentrees” and is located in McKinleyville, California. This item can be shipped to United States.