Extreme drought and bark beetles now threaten California's Ancient Bristlecone Pine Forest, home to Methuselah, a 4,853-year-old bristlecone pine.

Two white pines planted in the landscape; one is developing a general chlorotic appearance. White pine showing symptoms of decline on branches where the bark is shriveled and sunken. Depending on the ...

White pine decline causes pale green or off-color limp, drooping needles that later turn brown. The bark may be spongy and may shrivel and ooze sap. Usually, the entire tree is affected at once ...

Yes, white pine produces and seeps ample amounts of resin from breaks in the bark or ends of broken limbs. This was made openly obvious this February when many not-so-small limbs crashed with the ...

Whitebark pine that feeds grizzlies is threatened, US says Whitebark pine trees can live more than 1,000 years, but in just two decades more than a quarter of the trees have been killed. Credit: AP ...

About 100 whitebark pine tree seedlings were recently planted in Central Oregon. The tree population has been declining due to fungal disease, bark beetles and climate change.

The whitebark pine tree is a staple of Alpine ecosystems in western North America. These forests cover more than 80 million acres of land in two Canadian provinces and seven U.S. states, including ...

They chew their way out leaving small holes in the bark. These holes with dry resin, a withered stem and brown foliage, identify the injury from white pine weevil.

This week, we meet the eastern white pine or Pinus strobus, which historically was one of the tallest trees in the eastern United States. This conifer is the only five-needled pine native to Indiana, ...

In December, the U.S. Fish and Wildlife Service finally listed the tree as threatened. Whitebark pine trees are found as high as 12,100 feet and can live up to 1,270 years.

Climate change, wildfires and a deadly fungus threaten this iconic tree The U.S. Fish and Wildlife Service announced that it is listing the whitebark pine as threatened under the Endangered ...

A tree species that plays a critical role in the ecosystem of the greater Yellowstone area is dying off, and researchers are working hard to stop its decline. According to experts, whitebark pine, ...