Black Raspberries are now coming into their own in the wild brambles here. Unfortunately, the ripe one in this image is no longer with us. (It was delicious.)
There’s a quick way to tell a Black Raspberry from a Blackberry: pull the berry off the bush stem and look at the bottom of the fruit. If the berry is hollow, it’s a Black Raspberry; if there is a white stem core that plugs up the middle of the berry, it’s a Blackberry. (Brooklin, Maine)