Both will grow here... I see nightshade under trees sometimes in the woods, but haven't seen chokeberry before... and the tricky part is, this particular plant is not blooming... it has one little itsy bitsy flower coming on slowly... many many black round berries in clusters of 5, with non-covering calyx, and smooth leaves of differing sizes, with smooth entire nearly toothed alternate leaves... I'll try to get a pic this afternoon after it rehydrates... poor thing whatever it is dried up in the heat. We've had this bucket full of stuff since spring and didn't know this plant was there... it just surfaced in the last couple of months...

Thanks, it's black nightshade...