Abstract
During the three years from 1994 to 1996, the formation of reproductive organs on the current shoots and boughs of a native Aesculus turbinata BLUME growing at Mikata-cho, Mikata-gun, Hyogo Prefecture, Japan, was examined. Then, yearly fluctuations in the number of reproductive organs on the current shoots and boughs were analyzed. The current shoots developed from the terminal buds of flowering shoots did not flower, and none of the current shoots flowered during the first two years. Some of the boughs consisting of the clusters of current shoots flowered vigorously, but the other boughs flowered scarcely. Flowers (reproductive organs) seem to be formed or not formed depending on each shoot and each bough, even in the same tree.
