Q.My Daughter Has About 12 Small Slender Branchless Trees Growing In Her Woods.This Is The First Year We Have Noticed Them.
the single. small(3/4′ to 2″diameter)trunk is covered with thorns. So thick you cannot touch or grasp it. To remove them I have been cutting them at the base with big pruners and throwing them further into the woods. Now I worry that small animals might step on them injuring them selves. If I took a picture, could you identify them? I do not live with my daughter but go there several times a week. I’m trying to help her with her home.

Certified GKH Gardening Expert
It could be an Allegheny blackberry or a devil's walking stick (Aralia spinosa). You can run it past your local university extension director who would be more familiar with native trees in your area. Here is how to reach him/her.
https://www.gardeningknowhow.com/garden-how-to/info/what-is-extension-service.htm
https://www.gardeningknowhow.com/extension-search
https://www.gardeningknowhow.com/houseplants/aralia-plants/aralia-plant-information.htm