Boole (tree) the largest in Converse Basin Grove, was named around 1895 by A.H. Sweeny, a Fresno doctor, after Franklin A. Boole, a supervisor of the logging operation who spared the tree's life due to its great size. Before 1931, it was thought by many to be the largest tree in the world (although the General Grant Tree was more popularly known as the largest tree in the world at that time), but it is now known as the sixth largest tree, after five other giant sequoias: the General Sherman tree, the General Grant, the President tree, the Lincoln tree, and the
Sequoiadendron giganteum top ten largest giant sequoias sorted by volume of their trunks are: Sequoiadendron giganteum Sequoiadendron giganteum (giant sequoia; also known as giant redwood, Sierra redwood, Sierran redwood, Wellingtonia or simply Big Treea nickname used by John Muir) 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" (coast redwood) and "Metasequoia glyptostroboides" (dawn redwood). Giant sequoia specimens are the most massive trees on Earth. The common use of the name "sequoia" generally refers to "Sequoiadendron giganteum", which