Pine is a coniferous tree in the genus Pinus, in the family Pinaceae. There are about 111 species of pines worldwide, although different authorities accept between 105 and 125 species.

We’ve had a number of mysterious pine tree species in this column, and here is another. There’s always a new pine species to learn about: after all, there are about 100 species worldwide.

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 ...

The oldest tree species is the Great Basin bristlecone pine, with many trees dating back around 4,000 years. The oldest tree is named Methuselah and it dates back nearly 5,000 years.

White pine blister rust, a non-native invasive fungus that slowly kills the tree, has wiped out more than 325 million whitebark pine trees and remain the primary threat to the species, according ...

The whitebark pine is a hardy tree that grows in an area stretching from British Columbia, Canada south to parts of California and east to Montana. It's a keystone species in its subalpine and ...

Consumers have a surprisingly wide range of tree species to choose from at Christmas. This guide presents the pros and cons of 15 kinds of Christmas trees, from Douglas Firs to Virginia Pines.

We’ve had a number of mysterious pine tree species in this column, and here is another. There’s always a new pine species to learn about: after all, there are about 100 species worldwide.