The three photos at left show an accidental hybrid Bur-Valley Oak growing at Calaveras Nursery in Valley Springs, CA. Grown from an acorn taken from a Bur Oak growing in Sacramento which is surrounded by large Valley Oaks. This tree shows intermediate leaves, acorns and tree habit. The tree was planted roughly 20 years before the photo was taken, and now stands nearly 60-feet tall. A very compatible, vigorous hybrid.

Young Bur-Valley hybrids growing at Calaveras Nursery in Valley Springs, CA. These are seedlings of the large tree at far left.

Photos above, left, right show the artificially-created Bur-Valley Oak hybrid created at the University of Utah. Very similar to the big tree at Calaveras, with a slightly squatter habit, and thicker, more Bur Oak-like twigs. Leaf shows hybrid origin clearly.

These trees, which are sold as Quercus macrocarpa, have a consistent upright habit - a great tree for large planting spaces if potential acorn drop can be tolerated. Acorn production probably light and spotty in the Bay Area.