The Sequoioideae subfamily contains the largest and tallest trees in the world. These trees can live to an old age, with some for hundreds to thousands of years. The Sequoia and Sequoiadendron genera are massive trees. The tallest tree in the world is a Sequoia sempervirens, the Hyperion Tree. The largest tree in the world is a Sequoiadendron giganteum, the General Sherman Tree.