The Jeffrey pine, one of the iconic trees of the Sierra Nevada, appears to have eclipsed other pines to become the ...

UC Davis Professor Hugh Safford was hiking for pleasure in California's High Sierra when he stumbled upon a new elevation ...

UC Davis professor Hugh Safford found the highest living tree in California on a recent hike through the High Sierra.

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.

and becomes quite furrowed in older trees. The eastern white pine adds a ring of side branches and a terminal shoot yearly with age. The cones of this species are up to eight inches long, have ...

This summer generation has never been reported for this species of beetle. Previous studies reported that in response to warmer temperatures, the mountain pine beetle has substantially increased its ...

PORTLAND, Ore.— The U.S. Fish and Wildlife Service announced today that the whitebark pine will be listed as threatened under the Endangered Species Act. The pine is the most widespread tree to ...

"So these species, and probably most of the troublesome ones in terms of allergens, are wind-pollinated," he said. Forestry, one of the state's top industries, relies on the pine tree ...