California's oldest tree, a Palmer's oak thought to be 13,000 to 18,000 years old, may be threatened by a proposed development, environmentalists say.

As the name suggests, California oak moths are a native species, and their offspring like to feed on native coast live oak trees, or any other oak tree that happens to be in their path. Despite ...

The children were part of the Capitol Junior Rangers program, a statewide initiative for children aged 7 to 12 to learn about ...

The goldspotted oak borer is just 14 miles from the Santa Monica Mountains' 600,000 oak trees and threatens to devastate forests throughout California, harming wildlife and increasing fire risks.

Valley oak, one of North America’s largest oaks, was once one of the most widely distributed trees in California. As its name implies, it grows best in deep, rich alluvial soils like those in ...

Oak trees, sycamore trees, and all trees whose circumference exceeds 90 inches are examples of protected trees in the county. When those cases arise, damages or fines are determined after an ...

More than one million trees along California’s coast have died from Sudden Oak Death since its discovery in 1994. Santa Clara and San Mateo are among the 14 counties where the disease is present.

This tree has lived for 13,000 years. California’s housing crisis could doom it. The Jurupa Oak is older than almost any other plant on Earth.