Redwood trees can grow to be very large. The largest species, "Sequoiadendron giganteum," can reach up to 94.8 m tall and 17 m across. The tallest tree in the world is claimed to be a "Sequoia sempervirens" named Hyperion. The largest tree in the world by volume is claimed to be a "Sequoiadendron giganteum" named the General Sherman Tree, after William Tecumseh Sherman.