Hugo de Vries
Dutch botanist, cytologist, and hybridiser. Studied at Leiden, 1866–70; at Heidelberg with Wilhelm Hofmeister in 1870, and at Würzburg with Julius von Sachs in 1871. Completed a doctorate in physiological botany in 1876. Professor extraordinarius, botany, Amsterdam, 1878; professor, 1881. Developed a theory of heredity inspired by CD’s hypothesis of pangenesis (Intracellulare pangenesis (1889)). Rediscovered Mendelian segregation laws in the 1890s, and published on them in Die Mutationstheorie (1901–3).