A raspberry is an aggregate fruit, meaning it has many parts joined together. It is similar to a blackberry, but the fruit is hollow on the inside. There are many different species of raspberry plants, but only a few of them have fruit that are sold in stores. Leaves of the raspberry plant are also used fresh or dried in herbal teas. The raspberry is red when ripe, and is also a source of nectar for juices. Raspberries are a popular fruit in some parts of the world.