Quercus x hispanica | Palo Alto
This is the leaf of the Laucombe's Oak (Quercus x hispanica) in Palo Alto. The shape shows lots of similarity with Turkey Oak (Quercus cerris), the second parent. Turkey Oak is a late fall deciduous species, while the other parent, Cork Oak (Quercus suber) is semi-evergreen. Unfortunately, in this specimen, the combination causes the tree to hold onto its dead leaves all winter (marcessance), and gives the tree the appearance of a giant paper bag.