Distinction of lands corresponding to hierarchical sequences of plant communities means hierarchical classification of ecosystems. In this context, it is essential in determining of effective environmental characteristics at each different hierarchic level of vegetation distinction. Thus, a hierarchical mapping including ecological land units can be provided owing to comparison of same hierarchical level of vegetation classes with the land units marked at the hierarchical level of the map. The study was carried out in order to classify and map hierarchically Yazili Canyon Nature Park situated in the Mediterranean region, Turkey. 107 sample plots were selected. TWINSPAN (the two-way indicator test) was applied in order to divide land into units, and chi-square tests were applied for confirmation of the units. Interspesific correlation analysis was also applied to determine the indicator species at each level of division. As a result, six portions were defined at different hierarchical levels in Yazili Canyon Nature Park. Climatic heterogeneity - which originated from the heterogeneous landscape structure of the canyon - plays an important role in this separation.