Tree Blog

Quercus gambelii x macrocarpa | Red Butte Gardens, University of Utah

These leaves to Q. gambelii x macrocarpa, notably larger than typical Gambel Oak leaves, show a form that is clearly a modification of Gambel Oak leaves, as shown earlier in this section. Q. macrocarpa leaves are best known for their large and deep central sinus, cutting almost to the very center of the leaf. This deep sinusing carried over into the leaves of the hybrid, clearly shows the Q. macrocarpa paternal parentage.

Dave Muffly