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. It...

scientific names, Gambel oak and Quercus gambelii, were named after the American naturalist William Gambel (1821–1849). Quercus gambelii trees differ in size...

varieties: Quercus garryana var. garryana – tree to 65 (100) ft. British Columbia south along the Cascades to the California Coast Ranges. Quercus garryana...

and Texas Quercus deserticola Trel. – # Mexico Quercus diversifolia Née – Mexico Quercus douglasii Hook. & Arn. – blue oak – California Quercus dumosa Nutt...

Sierra Nevada, knobcone pine is often a co-dominant with blue oak (Quercus douglasii). The species is susceptible to fire, but this melts the cone resin...

Quercus × alvordiana, the Alvord oak, is a hybrid oak in the genus Quercus. It has been reported to be a hybrid between Quercus douglasii and Quercus...

poorly drained clay soils. It commonly occurs in association with Quercus douglasii, and "Oak/Foothill Pine vegetation" (also known as "Oak/Gray Pine...

Oak tree – Quercus Algerian Oak – Quercus canariensis Blue oak – Quercus douglasii Bur oak – Quercus macrocarpa California Black Oak Quercus kelloggii...

racemosa). The most common trees are coast live oak (Quercus agrifolia) and blue oak (Quercus douglasii), with the largest blue oak growing in Alameda County...

types including mixed oak forest. The California endemic Blue oak, Quercus douglasii is at the northernmost part of its range in Del Norte County. The...