Quercus douglasii, known as blue oak, is a species of oak endemic to (found only in) California, common in the Coast Ranges and foothills of the Sierr a Nevada.
Quercus douglasii prefers dry soil and plenty of sunlight. It is the most d rought tolerant of California's deciduous oaks.
Individual trees over 500 years old have been recorded, although most are l ess than 300 years old. Recent research has found several unlogged stands o f blue oak woodlands, suggesting that the state may harbor over 500,000 acr es (200,000 ha; 2,000 km2) of such old-growth forests.
blue oak tree ring measurements used to determine California is experiencin g 500 year drought...
That is one tough tree. Thankfully some ass never harvested the 500 year ol d specimens to build a ...hot tub...or something.