Augustin Pyramus de Candolle
![Portrait by Joseph Hornung, 1839](https://upload.wikimedia.org/wikipedia/commons/c/c8/Augustin-Pyramus_de_Candolle_%281778-1841%29%2C_botaniste_genevois%2C_professeur_%C3%A0_l%27Acad%C3%A9mie%2C_recteur_de_1830_%C3%A0_1832.jpg)
De Candolle originated the idea of "Nature's war", which influenced Charles Darwin and the principle of natural selection. De Candolle recognized that multiple species may develop similar characteristics that did not appear in a common evolutionary ancestor; a phenomenon now known as convergent evolution. During his work with plants, de Candolle noticed that plant leaf movements follow a near-24-hour cycle in constant light, suggesting that an internal biological clock exists. Though many scientists doubted de Candolle's findings, experiments over a century later demonstrated that "the internal biological clock" indeed exists.
De Candolle's descendants continued his work on plant classification; son Alphonse and grandson Casimir de Candolle contributed to the ''Prodromus Systematis Naturalis Regni Vegetabilis'', a catalog of plants begun by Augustin Pyramus de Candolle. Provided by Wikipedia
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3by 2546 M.O. Malte, W.R WatsonContributors: “...de Candolle...”
Published 1925
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4by 1088 J. Campbell-Snelling;M. ChambersContributors: “...de Candolle...”
Published 1982
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5by 97 Teresa DolmanContributors: “...(Linnaeus) de Candolle...”
Published 1995
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8by 98 J. Campbell;V. LeiffersContributors: “...(de Candolle) J.M. Coulter & Rose...”
Published 1981
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9by 204 Wm. H. SharpContributors: “...(de Candolle) J.M. Coulter & Rose...”
Published 1964
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10by 102 W.H. SharpContributors: “...(de Candolle) J.M. Coulter & Rose...”
Published 1964
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11by 4955 Col. G.H. TurnerContributors: “...(Fischer ex de Candolle) O'Kane & Al-Shehbaz...”
Published 1946
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