Quercus nigra | Stanford
Foliage of the Stanford Water Oak. The leaf shape of Water Oak inspired the French to call the tree the Duck-footed Oak. The leaves have a substantial waxy cuticle, giving the leaves stiffness despite their relative thinness. This waxy cuticle seems to largely protect the tree from powdery mildew, and no powdery mildew has been observed on the Stanford water oak in 15 years of observation. A few young Water Oaks have been planted at Stanford in recent decades, and, while they are healthy, their slow growth has been uninspiring.