India has a very rich biodiversity, unique physical and ethnic diversity, and traditional culture. In recent years, the habitat loss due to developmental programmes, overgrazing, animal husbandry and tourism has resulted in the loss of biodiversity. Natural causes such as floods, earthquakes and landslides also add to this tragedy. With this point of view, present work has been conducted which deals with a detailed study of habit and habitat, frequency of occurrence, ecological conditions, floral characters and ethnomedicinal properties of some endangered but medicinally important angiospermic plant species collected from Raebareli (U.P.). The reported plant species have been declared threatened by the Indian Subcontinent Plant Specialist Group. Therefore, there is urgent need to document complete biodiversity, prioritize useful threatened plants, and conserve them in-situ and ex-situ for sustainable utilization in health care and human welfare.