There are nearly 90 species of pine trees found throughout the globe, many of which have value for lumber, pulp, turpentine, oils, pine tar, chemicals and other “naval stores.” ...

The cones — approximately 3 inches — are asymmetrical and stay closed and attached to the branch for years. Bishop pine, Pinus muricata, is often confused with Monterey pine, Pinus radiata.

A new study of the ancient trees, including some specimens high on Mount Charleston, shows they are highly resistant to damage from mountain pine beetles, which have killed millions of other types ...

When research entomologist Barbara Bentz heard reports of mountain pine beetles infesting Great Basin bristlecones in Nevada, she wondered if the bugs had opened a new front in their assault ...

A pitch pine tree at the Wertheim National Wildlife Refuge in Shirley on Oct. 29, 2014 shows pitch tubes, or nodes of tree sap, which is a sign of the presence of the Southern Pine Beetle.

The trees had shown signs of infestation of two types of pine beetle that state entomologists say are attacking more and more of Washington's conifers as the climate gets hotter and drier.