Abstract: The flavone contents of Ginkgo biloba leaf stalks and leaves in different types of the branches and leafpositions were assayed in 1999. The results indicated that the flavone content rested on long-branch leaves had three
peaks , but only two peaks in both middle-short branch leaves and phyllome-branch leaves. Of all the peaks , the last one showed the highest value in all types of the branches. At the same time , the increasing speeds of flavone contents queued from fast to slow: long-branch leaves , middle-short branch leaves , phyllome-branch leaves and the leaf stalks. However there was an opposite trend of the change of flavone content in the leaves and its leaf stalk during the late stage. Flavone content in the middle-position leaves of long2branches was the highest , that in the basal leaves was the second ,
and that in the top-position leaves was the last. The relationship of the change of flavone content and its distribution with leaf classification , collection and trimming were discussed.

Key words: Ginkgo biloba, Leaf, Flavone, Branch type, Leaf2position, Leaf stalk, Distributing regulation