The "Hanahiri-no-ki" (Leucothoe grayana) belongs to Ericaceae (the Azalea family). It is a small deciduous tree that is distributed northward from Kinki district of Hanshu to Hokkaido. This tree grows in montane sparse forests or forest edges and can reach 50-150 cm in height. The leaves are elliptic to ovate-oblong and opposite. The pale green flowers bloom in the terminal racemes from June to July. The corolla is urn-shaped and quintuple-lobate shallowly at the tips. The fruits produce upright and split open when ripe. All parts of plants contain poisonous Grayanotoxin. The leaves had been ground into a powder for a maggot-poison or anthelmintic agent in former days. The Japanese name comes from the fact that if this powder gets into your nose, you will have a violent sneeze.