A hydrangea to know that I am seen midmost. Bai Juyi (hakukyoi) of the poet of Tang named the hydrangea an original “hydrangea” to a different purple flower in Japanese origin, and a scholar in the Heian era seemed to misuse “a hydrangea” to a hydrangea native to Japan. The color of a flower is purple, and there are various kinds of pink, blue, white. It is said that the color of the flower seems to change whether soil is acid, or it is alkaline, and it is like red like blue as for the acid soil in the alkaline soil.