


Looks like Tree of Heaven, but the tips of the leaves are rounded.
This came up amongst my daylilies last year. I neglected to remove it (I'm a lazy gardener) and is growing rapidly. I'm gonna cut it and paint the stump with "stump and vine killer," but I am curious what species this might be! It's hard to get a picture of the base through all the daylily leaves. I hope you smart people can help ID this!
EDIT: In Saint Paul, MN, USA