“Arnold Dodel (1843-1908) was a Swiss-German botanist who held professorships at Swiss universities where he studied plant reproduction and algal species and he founded a botanical microscopy laboratory at the University of Zurich.
Dodel was a prolific author of popular educational works on plants and an enthusiastic supporter of socialism. He was a regular correspondent with the eminent German biologist-artist, Ernst Haeckel, as well as Charles Darwin. Dodel was an early and vocal advocate for the Theory of Evolution (see).
Dodel married Carolina Port in 1875 and she contributed a large number of the illustrations to the series displayed above. He was subsequently known as Arnold Dodel-Port.” (Text from BibliOdyssey)