Douglas Soltis is a Distinguished Professor in the Florida Museum of Natural History and Department of Biology at the University of Florida. He studies plant evolution using genomic and informatic approaches; interests include genome doubling (polyploidy), genome evolution, building the tree of life, and angiosperm diversification. Soltis has reconstructed relationships among major lineages of flowering plants. With others, he proposed a new classification for angiosperms (APG system). He worked with Chinese collaborators to build a tree of life for the plants of China. Soltis is part of a group that built the first-draft tree of life for all 2.3 million named species on Earth. He and others clarified the ancestral angiosperm via the Amborella Genome Project. He and P. Soltis have also developed Tragopogon (Compositae) as a model for the study of polyploid evolution.