Pitch Pine Pitch pine trees (Pinus rigida) grow along the eastern North American coast and as far south as northern Georgia. This species thrives in a humid climate and on sandy, shallow soils.

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.

The best-known North American species with wingless seeds are the several closely-related species of pinyon pine. They grow on poor soils in dry areas of southwestern U.S. and Mexico.

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, ...

There are five species of pine that grow in Marin, John Thomas Howell writes in his book, “Marin Flora.” Bishop pine, Monterey pine, knobcone pine, Torrey pine and Coulter pine can be ...

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.

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 ...

Not every pine that has dead needles is infected with diplodia tip blight. “It’s normal for pine trees and other evergreens to lose some of their oldest needles every fall,” Yiesla said.

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 ...

Presence of blight confirmed in state’s pine trees July 23, 2023 at 2:28 a.m. by Nick Kordsmeier Special to The Commercial ...