Completely revised and updated with over 250 new entries, the third edition of this dictionary offers broad coverage of all aspects related to the field of plant sciences including biochemistry, plant physiology, cytology, ecology, genetics, evolution, biogeography, earth history, and earth sciences. New entries such as evo-devo, sister relationship, polytomy, and parallel sequencing make this the most up-to-date and comprehensive dictionary available. Useful appendices (The Universal Genetic Code, The Geologic Time-Scale, SI Units, Plant Classification, Fungi Classification) and a dedicated companion website featuring web links to relevant online resources support and enhance the A to Z entries. Clear, accessible, and concise, this is the ideal dictionary for students of botany, plant sciences and plant biology, environmental science and horticulture, as well as for amateur botanists and naturalists, and for the general reader with an interest in botany.