Charles Bonnet

Charles Bonnet
Bonnet painted by Jens Juel, 1777.
Born(1720-03-13)13 March 1720
Died20 May 1793(1793-05-20) (aged 73)
Genthod, Republic of Geneva
Known forPhyllotaxis
Scientific career
FieldsNaturalist

Charles Bonnet (French: [ʃaʁl bɔnɛ]; 13 March 1720 – 20 May 1793) was a Genevan naturalist and philosophical writer. He is responsible for coining the term phyllotaxis to describe the arrangement of leaves on a plant. He was among the first to notice parthenogenetic reproduction in aphids and established that insects respired through their spiracles. He was among the first to use the term "evolution" in a biological context. Deaf from an early age, he also suffered from failing eyesight and had to make use of assistants in later life to help in his research.