Aim: The aim of this study was to evaluate the sensitivity of Atrichum undulatum to soil Pb contamination and check its affectivity as an indicator of Pb pollution indicator. Methodology: Soil and plant samples were collected and characterized. Plants were grown in different levels of Pb contaminated soil (35, 70,140 and 280 mg kg-1, respectively). After 35 days, the plant samples were cut and ground to determine physiological and biochemical parameters. Results: Soil available Pb accounted for approximately 15-24% of total Pb, and the ratio of...