In the last century a lot of research work regarding the Indian lichens has been done by the European and Indian lichenologist. However, there is no single booklet or field guide of lichen is written for the amateur naturalist. Lichens are among the most widely distributed plant organism in the world. To date there are about 20,000 lichen species known in the world, out of which Indian subcontinent is represented by 2,450 species. Few professional lichenologist ...