Understanding species frequency distribution patterns within plant communities is crucial for studying plant community dynamics. This study aimed to model the habitat suitability of Astragalus spp. in the Tarikdareh rangelands of Hamedan using Ecological Niche Factor Analysis (ENFA) within the Biomapper software environment. Presence data for Astragalus spp. were collected through field sampling at 50 points, including latitude and longitude coordinates, and subsequently analyzed with environmental layers in Biomapper. The model results revealed marginalization, specialization, and tolerance values of 1.55, 6.35, and 0.17, respectively. A marginalization value greater than 1 suggests that Astragalus spp. prefers habitat conditions that deviate from the average, while the low tolerance index (0.17) indicates a high degree of specialization in habitat resources. The species suitability map generated by the ENFA model showed that Astragalus spp. prefers slopes greater than 25 degrees, with a higher density of distribution on southern, southwestern, and southeastern slopes.