I saw these berries along side the road in Mt. Gretna PA. We have seen many people out picking these berries over the past month, and I am curious as to what they are! I thought at first they were raspberries, but they don't really grow like I thought they should. There is one leaf per berry... TIA
Looks like not fully ripe blackberries, perhaps Rubus allegheniensis. 100% some kind of Rubus, black/rasp berries. -Corey