I believe it's Angelica. We've also seen it in Tuck's before. We saw some in Newfoundland several years ago that was in the neighborhood of 8-9 feet tall. Cool stuff.
I have seen this recently on a hike, Greylock maybe? Why I remember it is all the flies. Swarms of them, big ones too.
The plant looks like the same thing I gave my mother for Mother' Day one year, still in their yard. It had a light, blue flower on it.
Hope this helps.