Introduction to Pharmacognosy – definitions, scope and application. Literature of Pharmacognosy. Areas of application. Classification of natural drugs of vegetable origin. The microscope, optical principles and techniques. Macroscopy, microscopy and chemomicroscopy. Basic histology, micromorphology and anatomy of medicinal barks, roots, rhizomes, herbs, leaves, wood, fruits, seeds and flowers. Examples from Nigerian flora. The cell and cell-wall, structure and cell inclusions. Official Monographs. Field trips.