Quercus kelloggii
California black oak

Fagaceae (beech family)
California, Oregon
Quercus kelloggii, northernmost of the six on Bonair Siding. Sairus Patel, 8 Oct 2017

Native to the hills not far from campus, black oak is a deciduous tree with deeply lobed leaves (usually seven lobes) and a number of bristles on each lobe where the veins terminate. The leaf shape is similar to that of Quercus coccinea, but the color is a deeper green, glossy on top and lighter beneath. The acorn is about 1½ inches long, about half enclosed in the scaly cup. California black oak accounts for about one-fifth of all hardwoods in California.

Quercus kelloggii leaves, second most northern of the six on Bonair Siding. Sairus Patel, 8 Oct 2017

To see fine examples, sign up for a tour of Jasper Ridge Biological Preserve. Six young trees are on Bonair Siding at the edge of the Maples Pavilion parking lot.

Quercus kelloggii leaf and acorn. From: Howard E. McMinn & Evelyn Maino, An Illustrated Manual of Pacific Coast Trees

Illustrations: Jasper Ridge plant photo archive.

About this Entry: The main text of this entry is from the book Trees of Stanford and Environs, by Ronald Bracewell, published 2005.