A professor's casual hike in the High Sierra turned into a new elevation record for California's highest tree, the Jeffrey pine, which wasn't formerly known to grow at extreme elevations.

Allergy season can be miserable for tens of millions of Americans each year. Allergies are caused by trees, grass, and other ...

Skunk cabbage is the first native wildflower to emerge in Chicago’s woodlands in spring. Other ephemerals will follow, ...