Species and Varieties, Their Origin by Mutation

Hugo de Vries and Daniel Trembly MacDougal

Where do new species come from? Hugo de Vries answers with mutation, the sudden leaps he saw in his evening primroses that challenged the slow gradualism of his day. A foundational work of early genetics from a rediscoverer of heredity's laws. Dense, bold, and historically pivotal. Read the argument that helped reshape evolutionary thought.