Elderberries and chokeberries are not as beautiful or familiar as spring’s strawberry, but these small dark berries that ripen in late summer pack a nutritional wallop. I’ve know the elderberry (Sambucus canadensis) since childhood, but the chokeberry (Aronia melanocarpa) is fairly new to me. Whether you call the elderberry a tree or a bush, it is having a very good year. I seem to see elderberry bushes everywhere I go. I can easily identify the bushes with large…