The study of Palyno-taxonomy of some selected taxa of family Aytoniaceae Cavers, has been presented in this book. The study includes palyno-taxonomy of seven species of Asterella Beauv. Five species of Plagiochasma Lehm. et Lindenb., and one species each of Cryptomitrium Austin, Mannia Opiz. and Reboulia Raddi. The morphological characteristics of sporoderm and elateroderm have been given. This work has been presented in six chapters, including introduction and review of literature on spore and elater morphology in relation to palyno-taxonomy. The next sections include description, discussion...