The book titled as "Poisonous Herbal Plants" written with an intention to benefit the Diploma, UG, PG and Research Scholar students. This book acknowledged importance study of Medicinal Plants and the constantly increasing recognition of its extended practical as well as scientific applications. Since time immemorial, human beings have learned on plants/herbs/shrubs etc. for curative treatment of diseases and to secure prevention and cure against manifestations of various ailments. In this context the goal at this book is to provide the update knowledge to the students in the professional programmed at their study. The discovery of drug is tremendously increasing due to the great advancement bioassay screening isolation techniques and structure elucidation. The objective of this book is to spot a light on the brief introduction of about Poisons herbs and plants to the students and researchers. In the present global scenario, natural medicines are gaining prominence; because they are available at economical prices and relatively free from most of adverse drug effects or so called side effects.We have made every effort to avoid errors, clarify unmeaning words, and printing errors, but sometimes at then may arise in present edition, we would correct and/or omit hem in subsequent editions.