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Quercus agrifolia, the California live oak, [3] or coast live oak, is an evergreen [4] live oak native to the California Floristic Province.Live oaks are so-called because they keep living leaves on the tree all year, adding young leaves and shedding dead leaves simultaneously rather than dropping dead leaves en masse in the autumn like a true deciduous tree. [5]
Quercus douglasii, known as blue oak, is a species of oak endemic to California, common in the Coast Ranges and the foothills of the Sierra Nevada. [4] It is California's most drought-tolerant deciduous oak, [5] and is a dominant species in the blue oak woodland ecosystem. It is occasionally known as mountain oak and iron oak. [6] [7]
The "Henley Oak", in Covelo, California, is the tallest known valley oak, at 47 m (153 ft). [7] [8] The branches have an irregular, spreading and arching appearance. During autumn, the leaves turn a yellow to light orange color but become brown later in the season. In advancing age, the branches droop. The trees have pewter-colored rippled bark ...
California's oldest tree, a Palmer's oak thought to be 13,000 to 18,000 years old, may be threatened by a proposed development, environmentalists say.
California black oak is a deciduous tree growing in mixed evergreen forests, oak woodlands, and coniferous forests. California black oak is distributed along foothills and lower mountains of California and western Oregon. [6] [7] It can be found at altitudes of up to 1,800 m (5,900 ft), for example near Mount Shasta. [4]
Live oak was widely used in early American butt shipbuilding.Because of the trees' short height and low-hanging branches, lumber from live oaks was used in curved parts of the frame, such as knee braces (single-piece, L-shaped braces that spring inward from the side and support the deck), in which the grain runs perpendicular to structural stress, making for exceptional strength.
In a 2009 study, they determined the oak to be roughly 13,000 to 18,000 years old. The tree has survived by producing genetically identical sprouts, or cloning, for millenia.
A family in San Carlos, California, is facing an impossible decision: spend more than $40,000 to remove a nearly 500-year-old heritage white oak tree in their backyard or find new homeowners ...