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
Wakehurst Place of the world. The Wellcome Trust Millennium Building, which houses an international seed bank known as the Millennium Seed Bank (run by Kew, not the National Trust), was opened in 2000. The aim of the Millennium Seed Bank is to collect seeds from all of the UK's native flora and conserve seeds from 25% of the world's flora by 2020, in the hope that this will save species from extinction in the wild. Wakehurst is home to the largest growing Christmas tree in England, a giant redwood. The tree stands tall and is lit with around 1,800 lights from Advent