Unknown thorny shrub August 28, 2012 by GreatSwampNWR A neighbor recently ran across this plant growing in her yard. It have 5 leaflets with red veins and thorns. Any help identifying would be helpful. Comments One thought on “Unknown thorny shrub” Karl Anderson said: Without flowers or fruit that’s a nearly impossible call. If the thorns are all ong the stems, my first thought would be some kind of blackberry. But if the thorns are just at the bases of each leaf, it might be the up-and-coming weedy shrub fiveleaf aralia, Eleutherococcus sieboldianus – though the leaves don’t look quite right. I’ve only seen that plant once, and you won’t find a description in any field guide, but if you hunt around on line you might find a picture to compare. In the meantime, look around and see if there are any remains of fruit on the thing, and send along another picture. Or maybe somebody else has an idea on this one? Karl A. Leave a Reply Cancel reply You must be logged in to post a comment.