Oak Trees
An oak is a tree in the genus Quercus
Black Oak California Oak (Quercus agrifolia) Cork Oak (Quercus suber) Oak Words
Black Oak, Tree

The California Black Oak(Quercus kelloggii)

California Oak (Quercus agrifolia), On The Rooftop Garden, At Salesforce Transbay Transit Center, San Francisco, California

Quercus agrifolia, the California live oak or coast live oak, is a highly variable, often shrubby evergreen oak tree, a type of live oak, native to the California Floristic Province. It grows west of the Sierra Nevada mountain range from Mendocino County, California, south to northern Baja California in Mexico. It is classified in the red oak section of oaks (Quercus sect. Lobatae)[from wikipedia]

Cork Oak (Quercus suber), On The Rooftop Garden, At Salesforce Transbay Transit Center, San Francisco, California

Quercus suber, commonly called the cork oak, is a medium-sized, evergreen oak tree in the section Quercus sect. Cerris. It is the primary source of cork for wine bottle stoppers and other uses, such as cork flooring and as the cores of cricket balls. It is native to southwest Europe and northwest Africa. In the Mediterranean basin the tree is an ancient species with fossil remnants dating back to the Tertiary period.[from wikipedia]

Oak Words, As A Form Of Tree, Eugene, Oregon

Oaks have spirally arranged leaves, with lobate margins in many species; some have serrated leaves or entire leaves with smooth margins. Many deciduous species are marcescent, not dropping dead leaves until spring.[from wikipedia]

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