Smilax, I think

Is it possible that two vines are tangled together? The leaf looks like wild yam, and the fruit looks like wild grapes. I often find them in the same area.

Might be Smilax tamnoides.
Look for prickly stems & leaf edges with little teeth.

I thought you were showing a new way of serving blueberries. ;)

LOL Cath T.! ;o)

Thanks to everyone who pointed out it's in the Smilax family of plants. The plant that leaf and berries were taken from had no thorns.

Barb
southern Ontario, CANADA