The study focuses on the life and work of Adolf Pascher, one of the most prominent phycologists and protistologists of the 20th century. Almost for his entire life Pascher worked at the German University in Prague.
Since 1933 he wasthe director of the Botanical Institute and Botanical Garden of the Faculty of Science. Present study illustrates Pascher's career and shows that his studies was largely based in application of Haeckels biogenetic rule to microorganisms and algae.
Finally, Pascher's work and life in times of the Third Reich, as well as later significance of his studies are discussed.