Singh and Sinha (1997) divided India in to eight lichenogeographic regions based on the 10 dominant families and genera. These regions included all localities under Indian political boundary except for Lakshadweep Islands. Among these lichenogeographic regions Uttar Pradesh, Bihar, part of Jharkhand and West Bengal are included under ‘Gangetic Plains’ region. This region being located in lower altitude with hot and humid climate supports comparatively less diversity of lichens represented by 483 taxa. Whereas Eastern Himalaya together with North-east India, Western Ghats and Western Himalaya are hotspots for lichens with 1589, 1463 and 1185 taxa. The other lichenographic regions are Andaman Nicobar Islands, Central India, Eastern Ghats along with Deccan Plateau, and Western Dry Region records 552, 483, 473, 343 and 115 taxa respectively.
