hybridizations

Updated: May 20, 2025

Coming now to the subdivisions and headings under which my material is to be presented, I propose describing first the real nature of the elementary species and retrograde varieties, both in normal form and in hybridizations. A discussion of other types of varieties, including monstrosities will complete the general plan.

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

In some of the cases the history of our flowers is so old that their hybrid origin is forgotten, as in the case of the pansies. Hybridizations are still going on in other groups on a large scale, and new forms are openly claimed to be of hybrid origin. Breeders and amateurs generally have more interest in the results than in the way in which they have been brought about.

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

It is often obscured by the accompanying varietal marks, or overlooked for this reason. Only in rare cases it is to be met with in a pure state and some examples are given of this below. Before doing so, I must call your attention to another feature of the unbalanced unions. This is the diminution of the fertility, a phenomenon universally known as occurring in hybridizations. It has two phases.

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