Sequoia sempervirens is the sole living species of the genus Sequoia. Common names for Sequoia include coast redwood, coastal redwood and California redwood. It is an evergreen, long-lived, monoecious tree living 1,200 -1,800 years or more. This species includes the tallest living trees on Earth, reaching up to 379 feet (115.5 m) in height (without the roots) and up to 29.2 feet (8.9 m) in diameter at breast height (dbh). These trees are also among the oldest living things on Earth. Before commercial logging and clearing began by the 1850's, this massive tree occurred naturally in an estimated 2,100,000 acres along much of coastal California and the southwestern corner of coastal Oregon within the United States