Synopsis The first ten volumes of the Icones Plantarum were edited by William Jackson Hooker himself, although, in the later volumes, some of the texts were provided by other authors, notably Joseph Dalton Hooker. The volumes 1-4 constitute the first series, the numbers 5-10 the second series. The first eight volumes were published in two parts of fifty numbered plates each. Since every double plate received two numbers, however, the actual number of plates per part is 50. The parts also received numbers, which were consecutive throughout the major part of the series. The third series of Hookers Icones Plantarum was edited by Sir Joseph Dalton Hooker (vols. 11-19) and later by Daniel Oliver (vol. 20). Each volume consists 100 plates and was published in four parts of 25 plates each.