This volume continues the content of Volume 1. While the first volume placed particular emphasis on introducing users to recognizing family relationships, this one provides keys for subdividing families into genera and species. In line with the fundamental concept of the entire series, woody plants (trees, shrubs, and lianas), clubmosses, horsetails, and ferns are arranged according to their systematic relationships, rather than by flower colors. The larger families are presented in detail. There are also photos and information about the biology and ecology, distribution, and usability of species that did not fit into Volume 1. The information regarding medicinal effects or toxicity is carefully aligned with the latest scientific findings. Particularly noteworthy species are given a more detailed monograph.