Emanuel Bonavia's late-19th-century work provides comprehensive information on the variety of citrus fruits grown in India and Ceylon (now Sri Lanka).

This comprehensive book covers the theoretical and practical aspects of citron trees and fruit. The citron (Citrus medica L.), one of the three primary species ancestral to most citrus types, is used for traditional medicine and is highly revered in the Jewish religion during the Tabernacles feast, referred to by the name 'Etrog'. This book’s three sections address biology (botany, genomics, Chinese and Mediterranean citrons, diseases, pests, and horticulture), tradition (Talmudic discourse, mysticism, medicine, literature, art, food, and beverages) and history (archaeology, trade, grafting controversies); these sections are supplemented by a glossary and pictorial album. The 22 chapters, some new and some translated and considerably expanded from the 2018 Hebrew edition, were written by world-renowned specialists from Israel, Italy, France, the U.S.A., China and Australia. The book is written in an accessible scientific style aimed at a wide range of readers.

This book is an authoritative guide to the oranges and lemons cultivated in India and Ceylon. Beginning with a discussion of the history of citrus cultivation in these regions, Emanuel Bonavia covers every imaginable aspect of citrus fruits, including their descriptions, derivation of their names, chemical characteristics, and pests and diseases. This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.