Uncover the hidden world of India’s Parmelioid lichens in this groundbreaking revisionary study. P.K. Divakar presents a comprehensive account of lichen diversity across India’s phytogeographic regions, filling a crucial knowledge gap. This authoritative text is indispensable for lichenologists, botanists, and researchers, detailing 192 species with full scientific descriptions, chemical data, illustrations, and conservation status. Essential for students and professionals studying Indian flora and biodiversity conservation.