Bilberries – which are native to Europe – are different from North American blueberries, although the species are closely related and belong to the same genus, "Vaccinium". Bilberry are non-climacteric fruits with a smooth, circular outline at the end opposite the stalk, whereas blueberries retain persistent sepals there, leaving a rough, star-shaped pattern of five flaps. Bilberries grow singly or in pairs rather than in clusters, as blueberries do, and blueberries have more evergreen leaves. Bilberries are dark in colour, and usually appear near black with a slight shade of purple.