This textbook has been designed to meet the needs of B.Sc. Second Semester students of Botany for the Panjab University, Chandigarh. Maintaining the traditional approach to the subject, this textbook not only provides strong conceptual understanding, but also helps in developing scientific outlook of the student. It comprehensively covers two papers, namely, Plant Diversity-II and Genetics. The first part discusses the diversity in various life forms of plant kingdom. It also discusses the reproduction and life cycle of Bryophytes and Pteridophytes. Second part of the book on Genetics, provides an insight about the important role of Genetics on the structural and functional differentiation of plants. Mendel's life, laws of dominance, segregation and independent assortment are discussed in this book. Further, it elucidates linkages, crossing over, sex linked inheritance and mutation.