It looks like Sambucus nigra, but I would want to see the flowers and an entire leaf (pinnately compound, with 3-7  leaflets) before giving a confirmed id. 

That looks like elderberry. The flowers are yellowish-white and have five rounded petals (and visible stamens, though I couldn't count how many). Leaves are serrated, opposite, and pinnately compounded, and it looks like they have 5-11 leaflets though it is hard to tell from the photos alone. The berries dark purplish, look to be about 1/8th of an inch in diameter, and ripening at the end of summer. Don't eat the berries raw, they need to be cooked. When consuming plants you aren't familiar with, always start by tasting a very small amount, wait 24 hours, and if all is well, then you can consume more.