Dave Powell/USDA Forest Service (retired) / Bugwood.org. All spruce trees have sharp-pointed needles that are often 4-sided or diamond-shaped in cross-section and have four whitish striped lines.

Example of conifer trees include pine, fir, spruce and cedar. Some shrubs which are conifers include juniper, arborvitae and ...

Now, researchers at the University of Texas at Arlington are using artificial intelligence to take the guesswork out of pollen tracking, starting with tree pollen.

Example of conifer trees include pine, fir, spruce and cedar. Some shrubs which are conifers include juniper, arborvitae and others. Garden: Flowering plants that thrive in full sun and high heat.

Pine trees grow faster than spruce and fir and are commonly used as Christmas trees. They tend to dry out somewhat faster than firs. True firs, such as balsam, Fraser, ...

Unlike those on spruce trees, fir needles are fat and flat (think "FFF"). You wouldn't be able to roll a fir needle around on your fingertip, whereas a spruce needle has four sides so you can roll it.

Annual cold snaps have kept some invasive tree pests in check, but outbreaks could become more common with warming ...

It stripped the needles from fir and spruce trees across most of northern Maine, killing 7 million acres of trees and costing the state’s forest economy hundreds of millions of dollars.

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 ...

Did you know that many parts of common trees like the leaves, ... beech, Douglas fir, spruce, pine, larch and silver fir are ...

Reviewing the wild world of evergreens can help gardeners and homeowners care for and maintain their landscapes.