In early spring, we transplanted what we thought was a Sweet Autumn Clematis (long story), but this came up instead. Does anyone have any ideas as to what it could be? I fear it might just be a weed (someone even mentioned it could be poison ivy due to the leaves of three, but I am pretty sure/I hope that's a mistake!).

It doesn't have any flowers (or even buds) on it yet, but I'd like to be sure before deciding what to do with the plant. Also, I can take better pictures if need be (and I hope these images are not too big - I'm a newbie here). Thank you!

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