The typical balsam fir tree is about 60 feet tall and 1-1/2 feet in diameter, although much larger trees (90 feet tall and ...

In anticipation of a hotter, drier climate, foresters across the Pacific Northwest have been testing new species of trees.

Using plant keys, or what are also commonly called dichotomous keys, is a useful way to identify plants. With the holidays ...

Scientists at Washington State University are looking at what goes into that choice, contributing data to research to ...

CORVALLIS, Ore. (KTVZ) – Increases in mortality among Douglas firs in the Klamath Mountains are the result of multiple factors that have the iconic tree in a “decline spiral” in parts of the region, a ...

Weighing the environmental pros and cons of a real or artificial Christmas tree can get murky. Here are a few things to ...