Black Walnut Identification

Arborist Forum

Help Support Arborist Forum:

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.
Check out the descriptions and pictures in this link:
http://www.hort.purdue.edu/ext/senior/fruits/blackwalnut5.htm

Excerpt:
Black walnut leaves generally have more leaflets (15-23) compared to butternut (11-19). The leaflet size is of black walnut is typically smaller than butternut. Also butternut leaves are hairy on their midvein, while black walnut is hairless.​
 
Last edited:
Kevin, welcome to the site.

The Black walnut will not have a terminal leaflet (which your pictures appear to display the absence as well), so I am going with Black walnut.

The Butternut DOES have a terminal leaflet. This is a helpful diagnostic.

The bud scales are also different so if you could post a picture of a twig, that might help us confirm. I also like to see the whole tree.

Black walnuts will typically have darker bark. The butternut, to me, almost looks whitewashed in comparison.

Sylvia

P.S. As with all things in nature, there are the exceptions to the rule. This is why looking at many of the characterisitcs are helpful, rather than a single determining factor.
 
Kevin, your photos show terminal leaflets, however, I am still going with Black walnut. The following information is from Ohio State Univ. website.

Butternut: "This tree may also be distinguished from black walnut by the velvet collars just above the leaf scars left by the previous year's leaves. Pith is dark brown in color, chambered after the first season, and a good identification characteristic."

Black walnut: "Leaf scars lack a hairy, felt-like margin on the upper edge of the leaf scar. Pith in the twigs is buff-colored and chambered after the first season."

So if you have a second year twig you want to disect, you might get a definitive id.

However, here is a link to a butternut stem, which does not look like your stem.

http://www.treetopics.com/juglans_cinerea/butternut_2972b.jpg

Here is a link to a black walnut stem (ignore the dead tip and look at the junction of the leaf) which looks like your stem.

http://www.plantmanagementnetwork.org/pub/php/brief/2007/walnut/image/StemCanker4c.jpg

These trees are much easier to tell apart when they are mature. :dizzy: I think I now have your headache. :)

Sylvia
 
Thanks for all your hard work Sylvia.

I have two of these and I'll be happy they're either. I'll wait for a few years and try again.

Thanks again.

Kevin G

p.s. turns out there's a very old stand of black walnut trees not 100 yards from the tree in question
 

Latest posts

Back
Top