I'm going to need a little help from my Midwestern friends. The below weed grew around my grandparents' barnyard. We were warned at an early age to not eat of the fruit, which turns a very deep black-purple when ripe, lest we become aware of ourselves naked on a hospital gurney.
The below photos were taken on a Portland street. The same plant as back home was part of a landscaped patch of earth right along the sidewalk. Please help me name the plant. Thank you.