The Katarniaghat Wildlife Sanctuary is a protected area in the Upper Gangetic plain, near Bahraich city in Bahraich district of Uttar Pradesh, India and covers an area of 400.6 km2 (154.7 sq mi) in the Terai of the Bahraich district. In 1987, it was brought under the purview of the ‘Project Tiger’, and together with the Kishanpur Wildlife Sanctuary and the Dudhwa National Park it forms the Dudhwa Tiger Reserve. It was established in 1975. The Katerniaghat Forest provides strategic connectivity between tiger habitats of Dudhwa and Kishanpur in India and the Bardia National Park in Nepal. Its fragile Terai ecosystem comprises a mosaic of sal and teak forests, lush grasslands, numerous swamps and wetlands. Keeping this in mind the authors surveyed with thirty-nine Angiospermic host plants representing thirty-nine genera and twenty families being parasitized by forty fungal species representing thirty-fungal genera.