The Alphabetical Indexes are cumulative indices to all 30 volumes of the "Flora of the USSR" and together constitute the thirty-first and final volume of this monumental work. This volume consists mainly of separate indices to the scientific (Latin) names of the families, and the genera and species in the Flora, but it also includes a list or index of the authors of the Latin names, alphabetized by the standard abbreviations used for them in the text, and summaries of other commonly used abbreviations. Two maps are appended, with keys to them added by the Translator and General Editor. The Latin-name indices have been reproduced page for page from the original Russian edition. The original Russian volume also included cumulative indexes to the Russian vernacular names, but these indexes have been omitted from the English translations of volume I-XXX.