Elderberry, makes good wine.

Elderberry. Keep this valuable bird friendly shrub… Your friends are partly right, don’t eat the leaves or stems or roots… The berries are the only edible part of the plant.

Not poison sumac. http://cal.vet.upenn.edu/projects/poison/plants/slides/1035lg.jpg Compare to Elderberry. http://perennialstore.blogspot.com/2010/11/american-elderberry-sambucus-canadensis.html

Though I can’t be 100%, this looks a lot like an Elder Tree variant, mainly because of the leaf structure. I have ruled out white yarrow. It isn’t cow parsnip because the leaf structure isn’t the same. Hemlock has a ferny type foliage and you can find reddish/purplish blotches on its stems/bark. Queen anne’s lace seems to grow upwards from ground like stalks or stems. It doesn’t look like that either. Also, because its in a flower bed, it looks like it was strategically placed to be there making me think that its not the super bad plants we like to think of. I would wait and see if you get the berries like an elder plant, or do more research. White lacy flowers if not properly identified could be very harmful. Hope this helps.