Edgar Nelson Transeau (1875–1960) was an American botanist and phycologist who served as president of the Botanical Society of America and the Ecological Society of America. Transeau was born in Williamsport, Pennsylvania, on October 21, 1875, and graduated from Franklin & Marshall College in 1897. He received a PhD from the University of Michigan in 1904, and in 1915 joined the faculty of Ohio State University where he spent the majority of his career, becoming professor emeritus in 1946.^[1] The standard author abbreviation Transeau is used to indicate this person as the author when citing a botanical name.^[2]