Portrait of botanist Johannes Müller Argoviensis [Unknown authorUnknown author / Biodiversity Heritage Library:https://www.biodiversitylibrary.org/item/104951#page/128/mode/1up from the journal Bulletin de l'Herbier Boissier, published in Paris, France -- Public domain -- http://commons.wikimedia.org/wiki/File:Johannes Müller Argoviensis.png]