This book focus on plants in our environment. Taxonomy deals with the description and identification of plants and their classification into various natural groups according to resemblances and differences in their morphological characteristics. Biological systems of classification in systematic botany deals with the identification and naming of plants and their resemblances and differences mainly in their morphological characters. Angiosperm of higher flowering plants has been estimated to be over 199,000 species. The plants are not only numerous but are of various types and it can only be studied if arranged in some orderly system. This book will be useful for researchers and students.