re-energizing

Updated: May 19, 2025

In the case of negative or retrogressive varieties it is the transition from the active into a dormant state to which is due the origin of the variety. Positive varieties on the contrary owe their origin to the presence of some character in the species in the latent state, and to the occasional re-energizing thereof.

Hugo de Vries - Species and Varieties, Their Origin by Mutation