Owner's initials on cover. Despite the Latin title, this work includes a preface in English, bibliographic citations dealing with the history of Russian botany (those in Russian being transliterated) with brief analyses, and a very useful subject index. Also noteworthy is the plate occupying the centrefold, showing an 1898 plan of the Imperial Botanic Garden, St. Petersburg (which now houses the Komarov Botanical Institute). Rare.