Study and preservation of biodiversity are one of the global problems of modern world. Reasonable reduction of the quantitive composition of plants leads to disturbance of normal activity of natural ecosystems. This limits human’s opportunity of taking advantage of useful features of plants. For comprehensive research of the mentioned problems experimental site experiements in various regions of the country are very important. In the article taxonomical analysis of early spring and summer wild grass of Yardimli district of Azerbaijan has been provided, new areals of some species (Iris grossheimii (in Komanu plateau, Dagduzu village), Bellevalia longistyla (in Chichekli plateau, Arvana and Avash villages), Gladiolus imbricatus (Deman village)) have been described, distribution maps have been created based on GPS coordinates. About 405 taxa of 841 early spring and summer flora for district recor-ded in the flora of Azerbaijan have been collected. Of these 51 of species are species and have been included in the Red Book of Azerbaijan. The list of species also include 17 endemics of Azerbaijan and 5 endemics of Caucasus.