Description: English: Plate 3. Quercus douglasii H & A (blue oak): Typical scattered growth in the Sierra Nevada foothills (near Three Rivers, Tulare County), trees 25-40 feet high.. seasonal precipitation about 16 inches. Date: 1910. Source: Jepson, W. L. The Silva of California. Memoirs of the University of California, Volume 2, 1910. Author: Willis Linn Jepson.
: All biogeographical map images in this gallery could be re-created using vector graphics as SVG files. This has several advantages; see Commons:Media for cleanup for more information. If an SVG form of this image is available, please upload it and afterwards replace this template with {{vector version available|new image name}}. Description: English: Range map of Quercus douglasii. Date: 1999. Source: Digital representation of "Atlas of United States Trees" by Elbert L. Little, Jr. [1]. Author: U.S. Geological Survey. This image contains regular noise, texture, or interference which should be cleaned up using Fourier analysis or some similar appropriate method. Beginning with a higher resolution image may help. čeština ∙ English ∙ français ∙ русский ∙ македонски ∙ +/−.