Black Walnut

This large native tree provides excellent shade for large sites. The fruit is a large round husk covering a nut
that is a favorite food of squirrels. Take care in siting a black walnut as the species produces a natural plant toxin that reduces competition from some plants in the area.

Photo credit: By Geo Lightspeed7 - Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=110890105