Abstract: The relationships between biological characters of Parmotrema tinctorum in twelve individuals and their environmental factors were analyzed by the methods including the Redundancy analysis (CDA),and the variation patterns of the characters in different habitats were described.The results showed that the biological characters manifested a stability to a certain extent within individual,but they holistically had a great variability,and the anatomical character hyphae diameter had the minimum variation coefficients not only within individuals,but also as a whole.Redundancy analysis showed that the humidity had a significant negative correlation with illumination (an environment factor),the most-positive one with hyphae diameter,and the most-negative one with medulla width (a biological index).While the altitude had the most-positive correlation with rhizoid density and the most-negative one with lower cortex width.The amount of algae layer could reflect the comprehensive environment change very well,while the content of atranorine in organism could response to illumination of certain habitat sensitively.The material investment among different function parts of lichen thallus,which is of great importance in revealing the response model of lichens to environment change,deserves to investigate deeply.

Key words: Parmotrema tinctorum, environment, individual, variable coefficient, redundancy analysis, Yaoluoping Nature Reserve