Abstract: The transpiration rates of A.lobophylla and A.potaninii under different shape level were tested by use the LI-6400 convenient photosynthesis analysis instrument.In the meanwhile, the stomata behaviors such as stomatal size, stomatal density, stomatal open and stomatal conductivity were tested.By using the methods of path coefficient analysis and correlation coefficients, the relationships between stomata behaviors and transpiration of A.lobophylla and A.potaninii under different shape level were analyed.The results showed that there was roughly same influence on transpiration of A.lobophylla and A.potaninii by stomatal behaviors under different shape level.There was bigger inf luence on transpiration rare by stomata density of these two plants.There were significent correlations between stomata conductivity and transpiration of A. potaninii/i>.

Key words: Adenophora lobophylla, A.potaninii, stomata behavior, transpiration