Identity of this plant

Asked August 10, 2014, 8:32 PM EDT

Hi, We started noticing this plant becoming more pervasive over the past 3 years in the forest around our cabin in Pine Grove, Schuylkill County. It has thorns and a very thin stem. This year it is climbing around grape vines. This is the first year I'm seeing berries on the plants. What is this thorny plant?

Schuylkill County Pennsylvania

1 Response

It's possible that it is a mature flowering jimsonweed. I have attached a photo of one as well as a jimsonweed infestation similar to the one in your third photo. It's also possible it is a wild grape vine. The leaves of a wild grape vine are typically serrated but it's difficult to determine if the edges of the leaves in your photos are serrated. I hope this is of some help.