Conrad Gessnerwas a Swiss naturalist and bibliographer. He was well known as a botanist, physician and classical linguist. His five-volume Historiae animaliumis considered the beginning of modern zoology, and the flowering plant genus Gesneria and its family Gesneriaceae are named after him. A genus of moths is also named Gesneria after him. He is denoted by the author abbreviation Gesner when citing a botanical name...
(wikipedia)