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The leaves are variable, being 15–25 mm (5 ⁄ 8 –1 in) long and flat on young trees and shaded lower branches in older trees. The leaves are scalelike, 5–10 mm ( 1 ⁄ 4 – 3 ⁄ 8 in) long on shoots in full sun in the upper crown of older trees, with a full range of transition between the two extremes.
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]
In the fields of horticulture and botany, the term deciduous (/ dɪˈsɪdʒu.əs /) [1][2] means "falling off at maturity" [3] and "tending to fall off", [4] in reference to trees and shrubs that seasonally shed leaves, usually in the autumn; to the shedding of petals, after flowering; and to the shedding of ripe fruit.
Aesculus californica is a large deciduous shrub or small tree, up to 4–12 m (13–39 ft) tall, with gray bark often coated with lichens and mosses. It typically is multi-trunked, with a crown as broad as it is high. Trees are long lived, with an estimated lifespan between 250–280 (300 maximum) years. The leaves are dark green, palmately ...
Calocedrus decurrens is a large tree, typically reaching heights of 30–40 meters (100–130 ft) and a trunk diameter up to 1.2 m (3 ft 11 in). The largest known tree, located in Klamath National Forest, Siskiyou County, California, is 47.98 m (157 ft 5 in) tall with a 12 m (39 ft 4 in) circumference trunk and a 17.5 m (57 + 1 ⁄ 2 ft) spread. [8]
The leaves are green, and lighter on the underside. [8] The bark and leaves have a pungent scent resembling camphor when bruised, [8] due to a chemical known as umbellulone. [6] The leaves are entire and lance-shaped about 3–10 centimetres (1.2–3.9 in) long. They may substitute for the Mediterranean bay leaf in cooking.
Quercus lobata, commonly called the valley oak or roble, is the largest of the California oaks. It is endemic to the state, growing in interior valleys and foothills from Siskiyou to San Diego counties. [ 4 ] Deciduous, it requires year-round groundwater, [ 5 ][ 6 ] and may live up to 600 years. Its thick, ridged bark (resembling alligator hide ...
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 ]
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