Johannes Müller Argoviensis, a Swiss botanist specialist in lichens and director of Geneva herbarium, was entrusted with making a good many "Euphorbiaceae", "Acalypha"genus included, ready for De Candolle’s "Prodromus" (Müller Argoviensis, 1866). As a preparation for that public book, he published in "Flora" journal a lot of descriptions of new species based on specimens of Hooker herbarium, at Kew Gardens (Müller Argoviensis, 1864). In such a work, Müller for the first time uses a classification of "Acalypha" in two sections, i. e. “"Linostachys"” and “"Euacalypha"”, names which accompany each of the described species. In 1865, he publishes in Linnaea journal a first revision of genus, in which 164 species are gathered –67 of them first time described– and "Acalypha" is formally divided into two sections as above referred. The "Linostachys" section is based on the homonymous genus from Klotzsch (1846), and includes seven species with pedicellate male flowers and bracts non-increasing in the fruit. The "Euacalypha" section incorporates all 157 remaining species, which have sessile female flowers and bracts increasing in the fruit. This latter section is in turn divided into “"series"”, “"subseries"”, and finally in groups designated by the symbol “§”, mainly according to the relative positions of male and female flowers in inflorescences and depending on whether these are axillary or terminal, unisexual or bisexual. Finally, in De Candolle’s "Prodromus" (Müller Argoviensis, 1866) 30 new species are described, thus raising up to 215 the number of accepted species, which are ordered as per such a complex infrasectional classification. Nearly all names of subgeneric taxa from Müller are illegitimate according to the current rules of International Code of Botanic Nomenclature. Müller Argoviensis was also entrusted with the preparation of "Acalypha" for the "Flora Brasiliensis" of Martius (Müller Argoviensis, 1874), in which 10 new species are described. There he maintains his two sections, but he does not use the infrasectional classification.