participation/
If you share a yard with walnut trees and you would like to let me collect a leaf to see which nearby trees they are related to, email me at meg.wilson@wisc.edu
Walnut trees look very similar to both Tree of Heaven and Sumac when they are young. If you touch the stem of the young walnut it will feel sticky to your touch, and have a fresh, green smell.
If you would like to email me a photograph of your tree to see if it is a walnut, please make sure to include an image of the entire tree as well as an image of a leaf.
I am an Arboretum Research Fellow, and in that role I have a permit that allows me to collect leaves from walnut trees within the boundaries of the Arboretum. Please note that unless you have a permit, collecting of any type is not permitted within the Arboretum.