This book, developed under the auspices of the International Association for Plant Physiology, provides a handy guide to preferred terminology, symbols, and units of measurement in the plant sciences. Some chapters include formulas and definitions of specialized terms, while others include recommendations for suitable units based on the International System for Units (SI). The appendices offer guidelines on presenting scientific data, including principles of grammar, standards for effective oral and poster presentations, and reporting on data from experiments that utilized growth chambers. Each chapter has been written by an expert and reviewed by several others; discussions are condensed for easy reference, but still thorough enough to answer virtually any question concerning plant terminology.