Plants in their habitats have a close relationship with living and non-living factors of the habitat and any change in each of these factors may have a significant impact on the growth and deployment of the species. Some of the most influential factors on plant growth and establishment are soil, climate and physiography factors in their habitat area. Hedysarum criniferum is one of the indigenous plants of Iran rangelands and has been observed in different provinces based on the Flora Iranica. Four habitats of this species were selected in Isfahan, Fars, Qazvin, Kermanshah and Hamedan provinces. The collection of plant information was carried out using the minimal area method. In each plot, in addition to the slope and elevation from the sea level as physiographic factors, the number of Hedysarum plants, canopy cover and average height of species, as well as the percentage of vegetation cover of other species were measured. Soil samples were taken from the depth of 0-60 cm and close to the plants. Meteorological data of the closest stations to the studied habitats and the climatic factors (average mo[nthly temperature, total monthly precipitation, average monthly wind speed, maximum monthly temperature, minimum monthly temperature and maximum monthly wind speed) were calculated for each of the eight areas. The soil lab, the amounts of pH, etectrical conductivity, lime,organic carbony, gypsum, calcium, magnesium, sodium, potassium, phosphorus, absorbable sodium, total nitrogen, soil texture (percentage of sandy, clay, silt) and gravel percentage were determined. Statistical analyzes such as correlation, regression, were applied on experimental results, climatic data and data extracted from the plots, and the relationship between soil, climate and physiographic factors with the vegetation parameters such as canopy cover, density and average height of plants were investigated. The results showed that the studied habitats were almost homogeneous regarding the vegetation composition of these rangelands. In addition, the lime and magnesium as Soil factors, maximum monthly wind speed and total monthly precipitation as climatic factors and geographical directions of east and northeast as physiographic factors showed the most impact on the distribution the plant species. Also regarding the clustering results from climatic factors pointof view, the habitats were categorized as steppe, semi-steppe and arid forest groups. The results can be used for the management, conservation and development of Hedysarum species as one of native and valuable plants in Iran. KeyWords: Hedysarum criniferum , regression, clustering, climatic and physiographic factors.