IUCN maintains a Red Data Book, in which list
of endangered species of plants and animals has been given.
This book has pink pages for critically endangered species. In
Red Data Book, prepared by DOE, Government of India, 435
species of endangered plants have been listed. Some common
endangered plants are Aerides crispum (orchidaceae), Atropa
acuminata (solanaceae), Dioscorea sp. (dioscoreaceae), etc.