Alexander Geoffrey Floyd (1 April 1926 – 12 December 2022) was an Australian botanist with an expert knowledge of rainforest plants, particularly the rainforest trees of New South Wales. He has worked with the New South Wales Forestry Commission, the Department of Forestry in Papua-New Guinea, and the National Parks and Wildlife Service of New South Wales. He helped create the North Coast Regional Botanic Garden at Coffs Harbour. Two genera and several species of plants are named in his honour; including Floydia, Alexfloydia, and Endiandra floydii. Floyd died on 12 December 2022, at the age of 96.

Honours and awards

In 2008, Floyd was awarded the Medal of the Order of Australia "for service to botany, particularly through research and identification of sub-tropical rainforest plants and through support for the North Coast Regional Botanic Gardens, and to conservation and environmental education." Floyd has generally published as A. G. Floyd or Alexander G. Floyd.