Sequoiadendron giganteum (Giant Sequoia, Sierra Redwood, or Wellingtonia) is the sole species in the genus Sequoiadendron, and one of three species of coniferous trees known as redwoods, classified in the family Cupressaceae in the subfamily Sequoioideae, together with Sequoia sempervirens (Coast Redwood) and Metasequoia glyptostroboides (Dawn Redwood). Description Giant Sequoias are the world's largest trees in terms of total volume. They grow to an average height of 50-85 m (165-280 ft) and 6… (More on Sequoiadendron)