In fall 1978, Naturalists Gus Boik, Wendell D. Flint, and Robert Walker discovered the two large giant sequoia trees (Eric De Groot and Floyd Otter) just upslope from King Arthur. However, the group did not have time to name or measure the two trees after measuring King Arthur. In 1993, Flint again mentioned the existence of an unnamed, roughly 25-foot (7.62 meter) diameter giant sequoia just upslope from King Arthur that he wasn't able to formally measure or name.[citation needed]
In 2001, naturalists James Chelebda, Arthur P. Cowley, Lawrence L. Otter (son of Floyd L. Otter), and Michael Reed were able to locate, measure, and name Floyd Otter while surveying Garfield Grove for the National Park Service.[citation needed] Their measurements were later published in December 2012, along with a definitive list of the 30 largest known giant sequoias and their respective measurements.[2]