Is that tree a pine, a fir or a spruce? Here's a handy guide to identifying the many species of trees populating Central ...

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

With so many varieties sold as Christmas trees, knowing what differentiates a Douglas fir from a Norway spruce is key to shopping for a real tree you’ll love. You’re likely to see more than one ...

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

Loveland’s tree streets include 22 streets named for trees in the Pine Family. The family includes 234 species worldwide and they separate into nine groups: cedars, Douglas-firs, firs, golden-larch, ...

Fir trees in Oregon and Washington died in record-breaking numbers in 2022, according to as-yet unpublished research conducted by the U.S. Forest Service. Called “Firmageddon” by researchers, the ...