Giant Sequoias

Sequoiadendron is a genus of evergreen trees, with three species, only one of which survives to the present:

Sequoiadendron giganteum, extant, commonly known as wellingtonia, giant redwood and giant sequoia, growing naturally in the Sierra Nevada mountains of California

† Sequoiadendron chaneyi, the predecessor of Sequoiadendron giganteum, found mostly in the Nevada area of the Tertiary Colorado Plateau until the late Miocene

†Sequoiadendron tchucoticum Late Cretaceous; Enmyvaam River Basin, Russia