These trees, while shade tolerant, appear to prefer full sun when they can get it. This particular specimen only gets sun in the evening (which is when these images were taken). They all have the leaning trunk Sam mentions, and the strongly cordate leaf shape. While some of the leaves occasionally have two or three irregular lobes, most do not.
And, as we can see in these pictures, the fruits ripen to a deep, dark purple. My friends the catbirds (Dumatella carolinensis) are busy in these trees right now, and the deer are right behind them!