Jones has added information covering over one hundred new species and subspecies and updated his material on the two hundred species from the first edition. Each entry includes a full description, distribution and habitat information, and a detailed cultivation and propagation guide. The text is easily accessible for the home gardener yet maintains the highest standards of scientific accuracy. Over 360 colour photographs plus many other illustrations and maps facilitate easy identification of all living species. Additionally, since cycads truly are living fossils- having existed for at least 250 million years-much information is provided on their prehistory and history.