This module deals with angiosperms (flowering plants) that are the most diverse group of land plants and seed-producing plants. Angiosperms possess flowers, endosperm within the seeds, and the production of fruits that contain seeds. In this course, forty nine families have been described in detail, of which three are basal family, two from Magnoliid, fifteen from Monocots and twenty six from Eudicots. The orders and families have been arranged according to the Phylogenetic System of Classification of Angiosperms Phylogeny Group (APG III, 2009). The course deals with the fundamentals of the Systematic Botany and the descriptions of the families of Angiosperms.