Volume 3 of A Botanical Arrangement of British Plants by William Withering, published in 1792, serves as a pivotal continuation of his comprehensive work on British flora. This volume focuses extensively on cryptogamic plants—non-flowering species such as ferns, mosses, algae, and fungi—offering detailed descriptions and classifications. Withering’s meticulous approach in cataloging these species reflects his commitment to expanding the understanding of Britain’s botanical diversity, particularly in areas that were less explored during his time. ​

The structure of Volume 3 is methodical, providing not only botanical descriptions but also insights into the practical applications of each species. Withering discusses the uses of these plants in medicine, diet, rural economy, and the arts, thereby bridging the gap between scientific study and everyday utility. This practical orientation underscores the relevance of botanical knowledge to various aspects of daily life and industry in 18th-century Britain. ​

An integral feature of this volume is the inclusion of copper plate illustrations, which enhance the textual descriptions and aid in the accurate identification of species. These visual aids, combined with Withering’s accessible language, make the work valuable not only to scholars but also to amateur botanists and enthusiasts. The collaboration with Jonathan Stokes in providing references to figures further enriches the content, ensuring a comprehensive and user-friendly resource. ​

Volume 3 stands as a testament to Withering’s dedication to the field of botany and his innovative approach to scientific documentation. By systematically cataloging the cryptogamic plants of Britain and elucidating their practical uses, Withering contributed significantly to the botanical literature of his time. His work laid a foundation for future botanical studies and remains a valuable reference for understanding the historical context of plant science.