Devil's walkingstick, Hercules club (Aralia spinosa)

Non-native, introduced

This tree's leaves are huge and doubly compound.  Twigs are armed with stout spines, and leaf stalks are sometimes armed with prickles.  Attractive, juicy, dark purple-black berries are borne in the fall.  root sprouts often make extensive colonies.

To learn more about Devil's walkingstick, visit its profile at the USDA Plants Database