In a general paper on "Euphorbiaceae" systematics, Isao Hurusawa (1954) sets forth a new classification, where the rank of infrageneric taxa is even raised and a proposal is made to divide "Acalypha" into seven subgenera with 19 sections. Grady Webster (1967), in a study of "Euphorbiaceae" genera from Southeastern USA, deems inadequate the treatments given by Pax & Hoffmann and Hurusawa; he thinks that by dividing genus into two sections with many infrasectional taxa, such as presented by Müller, the grade of kinship between "Acalypha" species seems to be better outlined. Accordingly, Webster compiles "Acalypha" species from the United States into ten series, which are based on corresponding “§” groups from Müller.