When I first bought this tea the box was labelled as blueberry tea. Ironically, it didn’t contain any blueberries but only the closely related billberries so I am glad they changed the name. To be honest the first thing I taste here is the elderberry, which has been sweetened by the other ingredients. The tea is not overly tart, but does have enough tartness to suggest a slightly sour fruit. As you continue to sip the flavours do mix and I can see why they used to call it blueberry. It is not exact but it is close to the flavour of blueberry juice. Does anyone know what billberries taste like? Anyways this is a pleasant fruit tea, and makes a nice caffeine free option.