An investigation was carried out to study lichen flora of National Botanical Garden, Dhaka, during the tenure May 2018 April 2019. Seven genera lichens namely Chrysothrix, Cladonia, Cryptothecia, Herpothallon, Parmelia, Pertusaria and Usnea were recorded from 15 blocks Garden. Lichens abundantly grown their number increased June October, whereas November gradually decreased. The maximum frequen...