Quercus nigra | Stanford
Here we see the fallen winter leaves of the Stanford Water Oak. Leaves of Water Oak typically change color in a gradual process, and does not deliver terribly showy fall color. Many of the oaks which also grow in the southeastern US become chlorotic when grown in the soils of California. Soils in wet summer areas are typically biased toward acidity, while arid western US soils are typically biased toward alkalinity. Without the necessary soil acid, many trees of the southeast grow poorly in west. The Southern Live Oak is a striking and useful exception to this pattern.