Practical Manual of Plant Diversity: Cryptogams I (Algae, Fungi, Bryophytes, and Pteridophytes) is a comprehensive guide tailored for undergraduate and postgraduate botany students. This manual, authored by a team of experienced educators, covers detailed classification, morphology, and reproduction of plant groups such as algae, fungi, and lower vascular plants. It includes hands-on laboratory experiments, diagrams, and identification methods to enhance practical understanding. An essential resource for field and lab-based learning, this book is ideal for students, teachers, and competitive exam aspirants focusing on foundational plant diversity.