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
Roosevelt (tree) 21st largest giant sequoia. Roosevelt (tree) The Roosevelt tree is the largest giant sequoia ("Sequoiadendron giganteum") in Redwood Mountain Grove, which is itself the largest grove of giant sequoias on Earth, which are endemic to the Sierra Nevada of California. It is located in Kings Canyon National Park and Sequoia National Forest, at . The tallest giant sequoia on earth () is also located in this grove, along with the Hart tree which is just smaller than the Roosevelt tree. The Hart tree is tall, with a volume of . The Roosevelt tree, however, has a volume of around .