The specimens obtained by Reid and Groves, bequeathed to the British Museum by the latter in 1933, formed the basis of the present work, but Prof. Harris, in co

"The 35 species and 12 genera of presently known United States Mesozoic charophytes are described and illustrated. Seventeen species and one genus are new. Thei

The papers in this volume were presented at the Geobotany Conference held at Bowling Green State University, Bowling Green, Ohio, on 21 February 1976. Though su