. The giant sequoia (Sequoiadendron giganteum) is the world's most massive
tree,[1][2] and arguably the largest living organism on Earth. Sequoiadendron
giganteum is the sole living 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
and Metasequoia glyptostroboides