The book provide with the elementary knowledge of taxonomy of angiosperms and a concise account of ecology. About ninty five important families of angiosperms belong to both Monocotyledons and Dictyledons have been dealt, which will meet the demands of pass arid honours, students alike. As advances in plant taxonomy have been rapidly increasing during past several years, attempt has been made to treat each family on a new line of thought, particularly floral range, phylogenetic affinity with brief treatment on anatomical structure which will save the purpose and need of the students as well as frame the ground work for future specialized studies on systematic botany. Examples of plants growing in India and other countries too with their economic aspects have been given. Special morphology of each families have been treated in a separate paragraphs in way of discussion as it is very closely connected with the studies of angiosperm system. According to the rules of international nomenclature prescribed by Vienna congress have been substituted.