White Walnut Tree Identification
The white walnut tree (Juglans regia) is native to North America from Canada to Mexico. Its name comes from the fact that it resembles a walnut shell. The bark of the white walnut tree is dark brown with light spots or stripes along its length.
These stripes are usually lighter than the rest of the bark, which makes them stand out even more. The trunk of the white walnut tree is straight and narrow. Leaves of the white walnut tree are small, oval-shaped, greenish-white flowers that grow on short stalks. They have five petals each and bloom from late summer until early fall. The fruit of the white walnut tree is a seed pod containing seeds that resemble little pebbles when they’re first ripe. Seeds can remain viable for up to three years before being eaten. The white walnut tree produces large nuts called acorns, which are similar to hazelnuts. The acorn nut contains about 3% fat and 4% protein. White walnut trees are not invasive; however, they do spread rapidly through forests and other areas where there is a high population density. White walnut trees require lots of space because their roots extend deep into the soil. Because of this, they tend to take over smaller areas of land rather quickly.
Butternut Tree vs Black Walnut
The butternut tree (Juglans cinerea) and the black walnut (Juglans nigra) are both members of the Juglandaceae family. The butternut tree grows wild in the eastern United States, while the black walnut is mostly found in the central part of the country.
Sources & references used in this article:
Improving disease resistance of butternut (Juglans cinerea), a threatened fine hardwood: a case for single-tree selection through genetic improvement and … by CH Michler, PM Pijut, DF Jacobs, R Meilan… – Tree …, 2006 – academic.oup.com
A forest manager’s guide to butternut by K Woeste, L Farlee, M Ostry… – Northern Journal of …, 2009 – academic.oup.com
Identification of butternuts and butternut hybrids by L Farlee, K Woeste, M Ostry, J McKenna… – FNR-420-W. West …, 2010 – fs.usda.gov
A spatial modeling approach to identify potential butternut restoration sites in Mammoth Cave National Park by LM Thompson, FT Van Manen… – Restoration …, 2006 – Wiley Online Library
The peril and potential of butternut by K Woeste, PM Pijut – Arnoldia. 66 (4): 2-12., 2009 – fs.usda.gov
Butternut: an underused resource in North America by ME Ostry, PM Pijut – HortTechnology, 2000 – journals.ashs.org
Conservation and management of butternut trees by L Farlee, K Woeste, M Ostry, J McKenna, S Weeks – 2010 – nrs.fs.fed.us