CONTENTS: Preface, Introduction, Review of Literature, Meteorological Data, Systematic Study, The order Oedogoniales, Key to Genera, THE GENUS BULBOCHAETE C.A. AGARDH: Key to the investigated taxa, Description, Macrandrous, Homothallic Taxa, Nannandrous, Incompletely described Taxa, THE GENUS OEDOGONIUM LINK: Key to the investigated taxa, Description, Macrandrous, Homothallic Taxa, Heterothallic Taxa, Nannandrous, Incompletely described Taxa, Ecololgical Observation, Plates and Figures, References, Index.