enations

Updated: May 18, 2025

Such partial malformations obey a rule, that is common to them and to other foliar enations, viz.: that the side of the leaf from which they emerge, is always their outer side. The inner surface of these enations corresponds to the opposite side of the leaf, both in color and in anatomical structure. The last of the four rules above mentioned is that of the homologous variability.

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