fertilization-experiments

Updated: July 8, 2026

They are slipped over the flowering branches, and bound together around the twigs, thus enclosing the flowers. It is necessary to use prepared papers, in order that they may resist rain and wind. The best sort, and the one that I use almost exclusively in my fertilization-experiments, is made of parchment-paper.

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