With a wide variety of physical features and climatic conditions, India Possesses the richest and perhaps most diversified flora of all other Countries of a similar size on the surface of the earth, It is estimated that out of 250,000 Â 300,000 total plant species of the world, India harbors about 45,000 plant species. The diverse Vegetation and multiethnic groups make India one of the richest countries in term of culture and bio resources having all kind of food, Fiber, timber, species, gums, oils, Perfumes and medicinal plants. The country is also rich in population of poisonous plants but the official records are very less. Plants that causes undesirable or harmful effects on humans and animals are called poisonous plants, some plants shows their toxicological effect after ingestion whereas others only require contact to elicit response in human and livestock Knowledge of on poisonous plant is important as some of them are used in medicine. The Poisonous properties are due to toxic substances such as alkaloids, glycosides, saponins, tannin, resins, amines and bitter principles, etc.