Ord. Prof. Dr. Alfred Heilbronn (1885- 1961) came to the University of Istanbul in 1933 and returned to Germany in 1960. He founded in this University the “ Institute of Pharmaceutical Botany and Genetics”. He has been active until 1955, as the director of the institute, in the modern building at Süleymaniye, especially built for the biological departments of the Faculty of Sciences of the University. From 1935 on, A. Heilbronn lectured in this building Plant Biology to students in Medicine, Pharmacy, Dentistry, Forestry and Biology. He was furthermore responsible of the courses of Pharmacognosy for a while. He established a library, a herbarium and a Botanical Garden. He was a genitist, but he had also interest in Floristcs and Pharmacognosy. He collected plants and initiated in the institute a series of investigations on the diagnostical characters of Turkish medicinal plants. He wrote 6 text - books for his studenets, one is on Pharmaceutical Botany, the others on Plant Biology and Genetics. He published 24 papers, mostly in Turkish periodicals; 18 of them are in the field of Genetics. He supervised 11 thesis for doctor’s degree. Most of them dealt with morphological and anatomical characters of medicinal plants. Keywords :