Sequoiadendron

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...read more on Wikipedia.