Catalogue of about 3300 plants in the botanical garden of Leiden University (106 illustrated), compiled, and with plates apparently drawn by the author. Hermann had only recently introduced many plants to Europe from the East Indies, Ceylon, the Cape and America. Most entries give the Latin name of the plant with references to the literature; some give more detailed descriptions. Hermann sailed with the VOC (Dutch East India Company) to Ceylon in 1672 and collected many plants there. As a professor of botany and medicine at Leiden, he directed the University botanical garden from 1679 to his death in 1695. He made it the richest garden in Europe during the Dutch golden age, always in competition with Jan Commelin at the Amsterdam botanical garden. Hermann's premature death prevented publication of a planned second part of this catalogue.

Since the frontispiece and all botanical illustrations are on integral leaves, references to copies with 107 "plates" apparently include the frontispiece. Digital facsimile from Biodiversity Heritage Library at this link.