|| First edition. Early work by this American Botanist. Most have prior owner's stamp or name in ink on front cover, some nicks and sunning, else very good. The Spore-Mother Cell of Anthoceros (1899), The Evolution of Sex in Plants (1903), Oogenesis in Saprolegnia (1903), The Relationships of Sexual Organs in Plants (1904), Nuclear Studies on Pellia (1901) and Kerntheilung in der Tetrasporenmutterzelle bei Corallina officinalis L. var. mediterranea (1898)(bound in boards). * 6 volumes.