This document discusses morphological classification of crude drugs. Morphological classification organizes drugs based on the plant part used, such as leaves, roots, rhizomes, barks, fruits, and entire plants. Drugs derived directly from plant parts are called organized drugs, while drugs produced from plants through extraction or other processing are called unorganized drugs. Examples of each type are provided. While morphological classification is convenient for identification, it does not always correlate chemical constituents or therapeutic effects with the plant morphology. In summary, this document outlines morphological classification of crude drugs by the plant part used and distinguishes between organized and unorganized drugs.