Explore India’s vibrant macrolichen tapestry with this definitive scientific flora. A comprehensive compendium, it consolidates vital data on 122 genera and 874 macrolichen species reported across India, Nepal, and Sri Lanka. Featuring precise diagnostic descriptions and user-friendly artificial keys, this work simplifies identifying known taxa. Essential for new researchers in lichenology and experienced botanists alike, it makes scattered literature accessible, aiding accurate specimen identification. A must-have for anyone studying South Asian botany and the intricate world of lichens in India.