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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]
The acorns are 2–3 cm (3 ⁄ 4 – 1 + 1 ⁄ 4 in) long, [8] with a moderately sweet kernel, and mature in 6–7 months from pollination. Q. douglasii is monoecious and wind-pollinated. Flower buds take a growing season to develop into catkins. [5] Blue oak pollen is severely allergenic. [12]
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 ...
Of California's total plant population, 2,153 species, subspecies, and varieties are endemic and native to California alone, according to the 1993 Jepson Manual study. [4] This botanical diversity stems not only from the size of the state, but also its diverse topographies , climates, and soils (e.g. serpentine outcrops ).
Juglans californica, the California black walnut, also called the California walnut, or the Southern California black walnut, [1] is a large shrub or small tree (about 20–49 feet (6.1–14.9 m) [3]) of the walnut family, Juglandaceae, endemic to the Central Valley and the Coast Range valleys from Northern to Southern California.
After numerous California wildfires ravaged the dense forests of California, officials there are set to remove over 10,000 trees after they were damaged by the flames, drought, disease, and age.
One Long Beach group is turning dead urban trees into usable lumber, while planting new saplings and providing work for the people society has left behind. California is home to millions of urban ...
California also leads the nation in walnut production, producing 100 percent of all walnuts grown in the United States. [12] As a result of the trade war between the United States and China, farmers in California received about $76.3 million in federal subsidy payments from USDA, where some of the subsidies were received by walnut farmers. [13]