Abstract
The article examines the possibility of comparing checklists of flora of cities based on a number of characteristics: the year of the settlement’s foundation, the area and population at the time of collecting materials, the timing of research, the method of collecting materials, the revealed complexity of the ecotopological structure of the city and the number of species. The factor determining the possibility of comparing lists of flora species of cities is the approach to its study, since the method determines the researcher’s attitude to the object. Under the influence of the formed attitude to the object of research, the interpretation of factors significant for plants takes place.