Part 1 A special tribute: Jeffrey G. Duckett - the life and work of Professor Paul Westmacott Richards, 19 December 1908 - 4 October 1995. Part 2 Origins, evolution and systematics: the fossil record of early land plants and interrelationships between primitive embryophytes - too little and too late?, D. Edwards, C.H. Wellman and L. Axe; bryophyte phylogeny and the evolution of land plants - evidence from development and ultrastructure; bryophytes and the origins and diversification of land plants - new evidence from molecules, Terry A. Henderson, Russell L. Chapman and Cymon J. Cox; a molecular approach to bryphyte systematics, Martin Bopp and Ingrid Capesius; molecular taxonomy of liverworts, Helene Bischler and Marie-Catherine Boisselier; spore colour and ornamentation in the taxonomy of Asterella (Marchantiales, Aytoniaceae), David G. Long; the ordinal classification of mosses - questions and answers for the 1990s, Dale H. Vitt, Bernard Goffinet and Terry Hedderson; cladistic studies on pleurocarpous mosses - research needs and use of results, Lars Hedenas;revisited generic classification of the Orthotrichaceae based on a molecular phylogeny and comparative morphology, Bernard Goffinet and Dale H. Vitt; genetic analysis of a hybrid zone in Mielichhoferia (Musci). Part 3 Morphogenesis and cell biology: auxin structure-activity relationships in Physcomitrella patens, Neil W. Ashton; origin of biocentrioles in Anthocerote spermatogenous cells, Kevin C. Vaughan and Karen S. Renzaglia; microtubules and gametophyte morphogenesis in liverwort Marchantia paleacea Bert, P. Apostolakos and B. Galatis; protonemal morphogenesis, Jeffrey G. Duckett, Annette M. Schmid and Roberto Ligrone; gravitropism in moss protonema, Fred D. Sack, Tanyer A. Wagner and Volker D. Kern. Part 4 Physiology, ecology, pollution and global change: new perspectives in the biophysics and physiology of bryophytes, J.A. Raven, H. Griffiths, E.C. Smith and K.C. Vaughn; ecophysiology of photosynthetic pigments in aquatic bryophytes, Javier Martinez-Abaigar and Encarnacion Nunez-Olivera; nutrient retention, dessication and redistribution in mosses, Jeffrey W. Bates and Solveig Bakken; quantifying bryophyte-environment relationships, H.J.B. Birks, Einar Heegaard, Hilary H. Birks and Birgitte Jonsgard; modelling the dynamics of bryophyte populations, Lars Soderstrom; effects of ozone and atmospheric nitrogen deposition on bryophytes, J.A. Lee, S.J.M. Caporn et al; effects of increased carbon dioxide and nitrogen supply on mosses, Jyrki Jauhiainen, Jouko Silvola and Harri Vasander; sphagnum, the peatland carbon economy and climate change, R.S. Clymo; reproductive biology and life history strategies, R.E. Longton.