Quercus kelloggii (California Black Oak) - Describes physical features and provides images of mature tree, leaf, acorn, bark, and twig. - http://www.cnr.vt.edu/dendro/dendrology/syllabus/qkelloggii.htm
Quercus kelloggii - Distribution and occurrence, value and use, characteristics, and fire ecology. - http://www.fs.fed.us/database/feis/plants/tree/quekel/