Одесский национальный университет имени И. И. Мечникова
In 1917 he returned to Ukraine and actively participated in the creation of the National Academy of Sciences of Ukraine, holding the Botany Chair of the Ukrainian Academy of Sciences. He was the President of the Academy from 1922 to 1928. Between 1928 and 1933 he was the Director of the Botanical Gardens of the Odessa University in Odessa.