These are the fruit of a Korean dogwood. They look like alien space pods. Even better, they're edible. Really. The USDA states, "
The one I tasted didn't have much flavor, which might be a good thing, as the Wikipedia article on the genus Cornus states that the dogwoods in the genus that includes the Korean dogwood are "...mildly toxic to people." Guess I won't be taste testing these again. (Sorry, Mom, but the USDA said I could!)