Contents: Preface. 1. Introduction and classification. 2. Gametophyte structure of Thalloid liverworts. 3. Gametophyte of leafy liverworts. 4. The sporophyte of liverworts. 5. Gametophyte of mosses. 6. The sporophyte of mosses. 7. Asexual reproduction. 8. Sexual reproduction. 9. Morphogenesis, anatomy, physiology. 10. Ecology. 11. Geographical distribution; geological history; cytogenetics and speciation. 12. Taxonomy and evolution : conclusion. Bibliographical references. Index.