Only in 1828 E.A.Eversman was elected as an ordinary professor of Zoology and Botany. Eduard Aleksandrovich went to a number of expeditions in order to expand University collections of Zoology Study and Botanic Garden. The aim of the first trip was to visit the suburbs of salt lakes in Indera Mountains, where "many rare spring plants can be found".
During the expedition they found blooming Leontice vesicaria; Eversman wrote that "no botanist had seen the blossoms of the plant before". Eduard Aleksandrovich had been gathering his collection for the whole trip and later on gave 372 herbarium sheets to the University Herbarium. Now it enumerates 209 sheets, 183 of them having labels with the date and the place of gathering.
The first professor of Botany Aleksandr A. Bunge, a taxonomist and K.F.Ledebur's disciple, who traveled Altai, Mongolia and Iran, came to the University in 1833. Working at the university during a short period of time, he dedicated all his time mainly to systematizing numerous herbarium collections, which he had brought from expeditions.
Great changes in the history of Kazan School of Botany took place in 1836, when according to the new Statutes of 1835, the Botany Department headed by P.Ya.Kornukh-Trotsky, was opened at the University. Pyotr Yakovlevich dedicated much time to organizing the new Botanic Garden and studying the flora of the Kazan Province, however didn't publish a lot. During that period of time (in the 1840s) the University acquired two big herbarium collections of the world flora from Rouprecht and Kornukh-Trotsky, which are still preserved.
Kornukh-Trotsky systematized a new genus of mustard family and named it Clausia. The genus is called after the famous chemist and bonatist K.K.Claus, who published his work "Local Floras of the Volga Region Countries" in 1852.
Aleksey O.Yanovich succeeded to Kornukh-Trotsky at the Department. While working at the University he considerably enriched the equipment of the Botanic Laboratory. In 1863 Aleksey Onisimovich had to leave Kazan and teaching Botany there was stopped for some time.