Completely revised & 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 & earth sciences. New entries such as evo-devo sister relationship polytomy & parallel sequencing make this the most up-to-date & comprehensive dictionary available. Useful appendices (The Universal Genetic Code The Geologic Time-Scale SI Units Plant Classification Fungi Classification) & a dedicated companion website featuring web links to relevant online resources support & enhance the A to Z entries. Clear accessible & concise this is the ideal dictionary for students of botany plant sciences & plant biology environmental science & horticulture as well as for amateur botanists & naturalists & for the general reader with an interest in botany.