Goji berries latin name is Lycium barbarum, they are sometimes referred to as Lycium chinense.
James Wong pointed out last night that they originally came from China which is correct, the story of how the goji berries got into the UK is down to a chap called Archibald Campbell who was the Duke of Argyll (1682 -1761), around the 1730s he had some tea plants imported to his home, the full story can be read in Julie & Matthew Bruton Seals book "Hedgerow Medicine".
Goji berries also get called the Duke of Argylls Tea Plant, Chinese Wolfberry, Box Thorn & Matrimony Vine. It has antioxidant properties, is full of beta-carotene, high in iron and riboflavin (B2) and has goodly amounts of selenium and vitamin C, it can also help to promote a healthy gut flora.
Im tempted to have a go at growing my own, I noticed last week that my local garden centre had some plants in, bet there's none left this weekend lol! It does make me wonder how many other superfood herbs the public get sold under some other name actually grow in this country. Incidentally the flowers of the Lycium are really pretty making yet another good another reason for growing it, but left to its own devices it can take over the garden so be warned. Hope that helps?