Hah! Sounds like a wild grape variety (according to the interwebs) which sounds neat! I put in hardy kiwi this year and I'd like to add grapes within the next couple years for sure!
That's pretty much exactly what it is. I had a make and female hardy kiwi for about 5 years and never got fruit. I got rid of them and then after seeing them for sale again I did more research and read they can take several years to mature enough to produce fruit and I regretted pulling mine immediate!