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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.
Quercus douglasii (blue oak) [152] Accounts for a significant amount of the oak forestland in California. The wood is strong but not often harvested because of the short, irregular trunks. Uses: palatable food. [153] —
The woodlands in the Sierra are characterized by a dominant overstory of Foothill Pine (Pinus sabiniana), Blue Oak (Quercus douglasii), Interior Live Oak (Quercus chrysolepis), California Black Oak (Quercus kelloggii), California Buckeye (Aesculus californica), and understory plants including Ceanothus spp., Toyon (Heteromeles arbutifolia ...
Quercus douglasii – Blue oak; Other trees and shrubs Aesculus californica – California buckeye; Arbutus menziesii – Madrone; Carpenteria californica – Bush anemone, tree anemone (sn-endemic) Cercis occidentalis – Redbud; Fraxinus latifolia – Oregon ash; Fremontodendron californicum – Fremontia, California flannelbush
Leather oak (Quercus durata) - an evergreen shrub endemic to serpentine chaparral. Blue oak (Quercus douglasii) - in the Central Valley foothills and Coast Ranges. California black oak (Quercus kelloggii) - in the higher hills and mountains. Canyon live oak (Quercus chrysolepis) - found mainly in northern mountainous regions.
The genus Quercus contains about 500 known species, plus about 180 hybrids between them. [1] The genus, as is the case with many large genera, is divided into subgenera and sections. Traditionally, the genus Quercus was divided into the two subgenera Cyclobalanopsis, the ring-cupped oaks, and Quercus, which included
Oak tree – Quercus. Algerian Oak – Quercus canariensis; Blue oak – Quercus douglasii; Bur oak – Quercus macrocarpa; California Black Oak Quercus kelloggii; Canyon Live Oak Quercus chrysolepis; Champion oak – Quercus rubra; Coast live oak – Quercus agrifolia; Cork oak – Quercus suber; Dyer's oak – Quercus velutina; Eastern black ...
The Trinity Mountains contain significant forested areas, including stands of Black Oak (Quercus kelloggii), Blue Oak (Quercus douglasii) and Douglas-fir (Pseudotsuga menziesii). The Quercus douglasii occurrences are a disjunctive population of this California endemic tree species. [3]
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