Armen Takhtajan is among the greatest authorities in the world on the evolution of plants. This book culminates almost sixty years of the scientist's research of the origin and classification of the flowering plants. It presents a continuation of Dr. Takhtajan¿s earlier publications including ¿Systema Magnoliophytorum¿ (1987), (in Russian), and ¿Diversity and Classification of Flowering Plants¿ (1997), (in English). In his latest book, the author presents a concise and significantly revised system of plant classification (¿Takhtajan system¿) based on the most recent studies in plant morphology, embryology, phytochemistry, cytology, molecular biology and palynology. Flowering plants are divided into two classes: class Magnoliopsida (or Dicotyledons) includes 8