Environment Planet Earth How to Identify 8 Common North American Fir Trees Learn the subtle differences between Douglas, Fraser, balsam, white, and other firs. By Steve Nix Steve Nix Writer University of Georgia Steve Nix is a member of the Society of American Foresters and a former forest resources analyst for the state of Alabama. Learn about our editorial process Updated August 20, 2024 Marina Denisenko / Getty Images Planet Earth Outdoors Weather Conservation True firs are in the genus Abies and there are between 40 and 55 species of these evergreen conifers worldwide. They're members of the pine family (Pinaceae) and can be distinguished from other pines by their needlelike leaves. Pines have their needles attached to the branch in clusters of two, three, or five, whereas firs and spruces have them attached individually to branches. Fir trees are found throughout much of North and Central America, Europe, Asia, and North Africa, growing in higher elevations and mountains over most of the ranges. Noble, Fraser, Douglas, and balsam firs are extremely popular Christmas trees, generally considered the best trees for this purpose. Many of these are also desired decorative garden trees. Firs have absolutely no insect or decay resistance when exposed to the outside environment. Therefore, their wood (commonly called North American timber, SPF [spruce, pine, fir], or whitewood in the timber industry) is generally recommended for cheaper structural construction and furniture. Left outside, the wood doesn't usually last more than 12 to 18 months, depending on the type of climate it's in. Identifying North American Firs TracieMichelle / Getty Images Fir needles are typically short and mostly soft with blunt tips. The cones are cylindrical and upright. The shape of a fir tree is narrow with rigid, upright, or horizontal branching as opposed to the "drooping" branches characteristic of some spruce trees. 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. Fir needles are fairly soft, but spruce needles are sharp. Fir needles are attached to twigs, typically in two rows. The needles grow outward and curve up from the twig, forming a flattish spray. There's a distinct lack of needles on the bottom sides of the twigs, unlike spruces that carry needles in a whirl all around the twig. In true firs, the base of each needle is attached to a twig by something that looks like a suction cup. That attachment differs from that of spruce needles, which attach with a peg-like petiole (the small woody projection makes a spruce's bark much rougher than a fir's). Fir tree cones are significantly different across species. Humans rarely see true fir cones up close because they grow toward the top of the tree. These cones are shaped like an elongated oval and disintegrate on the limb (seldom dropping to the ground intact), and they perch upright and often ooze resin. 1 of 8 Balsam Fir (Abies balsamea) sf-dvs / Flickr / CC BY 2.0 The cold-loving balsam fir is North America's northernmost fir. Although it has an extensive range in Canada, it grows primarily in the northeastern United States. Its needles are flat with two white bands on the underside (they're attached spirally to the branches, but twist around to form two rows on one plane). You can see little disks where the needles join the branch. The balsam fir is small to medium in size, with a conical shape, and prefers moist—even swampy—boreal forest environments. You can identify it by its most distinguishing feature: a narrow and pointed, spire-like crown. These trees are shallow-rooted and often get blown over in windy conditions. 2 of 8 Pacific Silver Fir (Abies amabilis) weisschr / Getty Images While the bark of other firs is characteristically furrowed, that of a mature Pacific silver fir, native to the Pacific Coast and Cascade Range of the Northwest, is distinctly gray and scaly, growing in peculiar plates. Juvenile trees exhibit smoother bark but with resin blisters all over. As a shade-tolerant tree, it's often found in the understory beneath much bigger hemlocks. The needles are similar to those of the grand fir—dark green on top with white lines on the undersides. But the needles point forward and upward, rather than lying flat as grand fir needles do. The cones of the Pacific silver fir sit upright and turn from green to purple. When they disintegrate, they leave a cone core spike on the branches. 3 of 8 California Red Fir (Abies magnifica) Matt Lavin / Flickr / CC BY-SA 2.0 Found in the mountains of Oregon, Nevada, and California—especially in the Sierra Nevada range—the California red fir is treasured for its lumber, used extensively for framing and plywood. It's also grown commercially as a Christmas tree. When left to mature, these trees can reach impressive heights of 200 feet (even 250 feet in rare cases), with a diameter of 6.5 feet. The bark of young California red fir trees is gray and smooth, with resin blisters. As the tree ages, the bark roughens and develops fissures, taking on a more orange-red color. The blue-green needles are four-sided, not flat. Needles also curve like the ends of a hockey stick where they attach to their branches. They're attached spirally to the branch, but curve around to be above it. Cones are yellow-green when young and brown when mature, and release seeds to the wind in the autumn. 4 of 8 Noble Fir (Abies procera) Knaupe / Getty Images The noble fir shares its northwest range with the Pacific silver fir. So, how does one tell the two apart? For starters, the noble fir grows much taller, up to 300 feet. In fact, despite dwarf varieties being commonly used as Christmas trees, the noble fir is the tallest and all-around largest member of the true firs (its botanical name, "procera," literally means "tall"). Naturally, its cones are much larger than those of the Pacific silver fir. As with other firs, you can identify a noble fir by its needles. They'll be blue-green, with white bands on each side, and arranged in a spiral on the shoots. A noble's needles are shaped like hockey sticks and curve away from the branch as if they've been combed forward. 5 of 8 Grand Fir (Abies grandis) weisschr / Getty Images Like noble firs, grand firs are notably huge, growing up to 200 feet. The two, however, differ in their needles. Unlike the noble fir's hockey stick-like needles, grand firs have flat needles with rounded and notched ends. They're dark green with white bands underneath and a groove on the top. "Needles are arranged to form flat sprays that show both the upper and lower surfaces of the twig." The bark on young grand fir trees is smooth and covered in resin blisters and white spots, becoming more furrowed over time. Both noble and grand firs are considered subalpine, but the grand fir is hardier to elevations below 5,000 feet. It grows in the Cascades and the northern portion of the U.S. Rocky Mountains. 6 of 8 White Fir (Abies concolor) gaffera / Getty Images The white fir is perhaps the easiest true fir to identify because of its flat, bluish-to-silvery-green needles that extend from all sides of the branch and curve outwards and upwards. The needles measure between 1.5 to 3 inches in length. Cones can grow to 6 inches and are olive green when young, turning purple and then brown with maturity. They stand upright on the branches and disintegrate eventually. This pyramid-shaped tree has a broad growing range that stretches from the Cascades to mountainous regions of northern Mexico. It can be found in California, Utah, Colorado, Arizona, and New Mexico, too. Outside its native range, the tree is commonly grown for ornamental purposes and found on Christmas tree farms. 7 of 8 Fraser Fir (Abies fraseri) USDA Natural Resources Conservation Service / Wikimedia Commons / CC BY 2.0 The Fraser fir is rare in its natural Appalachian range but extensively planted and grown for Christmas trees. It's closely related to the balsam fir, another common Christmas tree variety, both known for their soft needles and pleasant fragrance. A unique characteristic of the Fraser fir is that its branches angle slightly upwards, giving it a compact appearance. Its needles are sometimes dark green and occur in two rows. They're flattened with a groove on the upper side and two white bands on the underside, where the pores (stomata) are located. Needles are 1/2 to 1 inch long, darker green on the top, and lighter on the bottom. The Fraser fir produces cones with a "bract" that extends past the scales, giving the cones the appearance of drooping on the branch. This is the biggest difference from the balsam firs, which don't have these visible cone bracts. Fraser fir can reach a maximum height of 80 feet and a diameter of 1 to 1.5 feet. Younger trees have smoother gray bark with resin blisters; with age, the bark develops thin, papery scales. 8 of 8 Douglas Fir (Pseudotsuga menziesii) pcturner71 / Getty Images Although certainly one of the most well-known varieties, the Douglas or Doug fir is not a true fir "because the cones hang down off the branch and fall off whole." It belongs to the genus Pseudotsuga and is native only to western North American forests. It can grow to an enormous 300 feet in height, second only to redwoods. Because they stay intact, Douglas fir cones can often be found (in copious quantities) in and under the tree. This unique cone has a three-pointed bract (snake tongue) between each scale. Besides this, the Doug fir is easy to identify by its needles, which whirl around the branch like those of a spruce but are notably softer. They also taper at the attachment point to the branch, unlike other fir needles. The needles stick out from all around the branch, resembling a bottle brush; but the needle tips are soft compared to spruce's sharp points. Some young specimens growing in the understory may still have flat needles, in which case you'll be able to identify the tree by looking for the iconic buds that are pointed, papery, and reddish-brown. Frequently Asked Questions What's the difference between a fir and a spruce tree? Firs and spruces have many similarities and are often confused with each other, but firs have needles that are rounded at the tip and flattened. Spruce needles are sharp at the tip and square so that they roll easily between your fingers. What do fir tree needles look like? Fir trees can be identified by their soft and flattened needles, usually green to dark green in color and rounded at the tip. What makes a tree a true fir? True firs, unlike other conifers, feature cylindrical cones that grow erect, pointing toward the sky, and disintegrate before falling to the ground. If you spot what you think is a fir with intact cones on the ground, it's probably a Douglas fir, not a true fir. View Article Sources "Balsam Fir." Arboretum. University of Guelph. "Pacific Silver Fir." Northwest Conifers. "California Red Fir." American Conifer Society. "Noble Fir (Abies procera)." Washington State Department of Natural Resources. "Grand fir." Government of British Columbia. "Fraser Fir." National Christmas Tree Association. "Conifers - Douglas Fir." United States Forest Service. "Douglas fir." Northwest Conifers.