Who was Hugo de Vries and what his achievements

Dutch botanist and geneticist Hugo de Vries is chiefly known for suggesting the concept of genes and for developing a mutation theory of evolution.De Vries was born in 1848.In his experiments on the evening primrose, in 1900,De Vries rediscovered Mendel's laws of heredity and developed his own theory that he published in his book "The Mutation Theory".He explained mutations as sudden, unpredictable changes in an organism that can be passed on the offspring.He proposed that this is how new species develop and evolve.His discovery helped in establishing Darwin's theory universaly.
   He died in 1935.