Augustin-Pyramus de Candolle

"... the hypothesis of nonpermanence is less workable than the other for with it we would know nothing." (1819)

Swiss botanist, father of Alphonse de Candolle. With Jussieu, de Candolle attacked the artificial system of plant classification of Linnaeus, influencing a younger generation of botanists including Asa Gray (who met both father and son in 1839). de Candolle held that species were permanent and each descended from a single individual, but granted that varieties arose by the influence of the environment and by hybridization. Died 1841.

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