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Among the most common species of ash that are seen commercially, some basic divisions can be made; the first is between White Ash (Fraxinus americana) and Black Ash (Fraxinus nigra)White Ash tends to have a lighter heartwood color, and wider spaced growth rings. By contrast, the heartwood color of Black Ash tends to be slightly darker, and the growth rings are typically much closer together.

White Ash (Fraxinus americana)Black Ash (Fraxinus nigra)
White Ash (endgrain)Black Ash (endgrain)

Additionally, White Ash tends to have winged parenchyma connecting the outermost latewood pores, while this latewood connectivity is largely absent from Black Ash (see below).

White Ash (endgrain 10x)Black Ash (endgrain 10x)

Although Black Ash can be separated from White Ash on the basis of macroscopic anatomy, many other species of ash cannot, and they share the same traits as White Ash. These indistinguishable species include: European Ash (Fraxinus excelsior), Oregon Ash (F. latifolia), and Green Ash (F. pennsylvanica)In many instances, knowing the geographic source of the wood will help differentiate these species, (with the exception of Green Ash, which has a natural range that largely overlaps that of White Ash). One variant of ash is Olive Ash (and its burl veneer), which does not refer to any specific species of ash, but instead is in reference to the darker, streaked heartwood found in some Ash trees, which tends to resemble the heartwood of olive trees in the Olea genus, and both genera are in the Oleaceæ family. Far and away, most commercial Olive Ash occurs as European Ash (Fraxinus excelsior), and is typically imported from Europe.

Olive Ash (sealed)Olive Ash (burl)


Perhaps the most common ash look-alike is Sassafras (Sassafras albidum). When viewed from the face grain, the wood bears a strong resemblance to Black Ash, closely matching its color and grain pattern. Even its light weight (31 lbs/ft3 average) closely matches the density of Black Ash (34 lbs/ft3 average). However, the x-factor is the scent of the wood: Sassafras has a very distinct, root-beer-like scent that is hard to confuse.

Sassafras (sealed)Northern Catalpa (sealed)
Hackberry (sealed)Hackberry (endgrain 10x)

A couple of other ash look-alikes are Catalpa (Catalpa speciosa) and Hackberry (Celtis occidentalis)Catalpa tends to have wider spaced growth rings than Black Ash, and at only 29 lbs/ft3 average dried weight, is rather light and soft. Hackberry’s 37 lbs/ft3 average weight closely coincides with most species of ash, but when considered anatomically, the latewood pores are arranged in wavy tangential bands, bearing a close similarity to elms (Ulmus spp.), particularly soft elms such as Red Elm (Ulmus rubra).


If you’re interested in getting all that makes The Wood Database unique distilled into a single, real-world resource, there’s the book that’s based on the website—the Amazon.com best-seller, WOOD! Identifying and Using Hundreds of Woods Worldwide. It contains many of the most popular articles found on this website, as well as hundreds of wood profiles—laid out with the same clarity and convenience of the website—packaged in a shop-friendly hardcover book.

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