Okay,like I said before,I am way out of my depth here.Thanks for your input!
I believe it is a purple chokeberry,see: http://en.wikipedia.org/wiki/Black_Chokeberry although I am not an expert.My late mother was particularly...
Thanks for the quick reply.I forgot to mention it has red leaves in the late summer/early fall,and produces purple berries.
Please help me identify this tree.I am in Winnipeg. Thanks!