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Hugo de Vries
Hugo Marie de Vries (Haarlem, 16 February 1848 – Lunteren, 21 May 1935) was a Dutch botanist and one of the first geneticists. He suggested the concept of genes, rediscovered Gregor Mendel's laws of heredity, and introduced the term mutation. He developed a mistaken mutation theory of evolution, mainly due to the peculiarities of his favourite organism, the Evening Primrose (Oenothera lamarckiana).