Emigrants to America at first took apple pips rather than scions, which would have died on the voyage, in order to establish the domestic apple in the New World. This procedure gave rise to entirely new varieties, which were further diversified by interbreeding with native American crabapples. As a result American apples became and remain a distinct group. Some have European characteristics, such as Boston Russet, a variety raised in the mid-17th century. Others are unlike their ancestors. For example, the famous Newtown Pippin is quite different from any European pippin.