dicotyledonous

Updated: May 9, 2025

Reduction in the vegetative and generative organs, in the anatomical structure and growth of the stems, and in sundry other ways is the method by which the monocotyledons have originated as a group from their supposed ancestors among the lower dicotyledonous families. Retrogression is the leading idea in the larger families of the group, as for instance in the aroids and the grasses.

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