スイカズラ科タニウツギ属の落葉低木で、学名は Weigela hortensis。英名は Japanese weigela。
The Japanese weigela (Weigela hortensis) belongs to Caprifoliaceae (the Honeysuckle family). It is a small deciduous tree that is distributed the Japan Sea Side of Hokkaido to Honshu in Japan. This tree grows in sunny dales and much branched, and it can reach about 5 m in height. The leaves are ovate-elliptic and opposite with acute tips. The corymbs are borne at terminal branches or axils, and bloom pale ponceau funnel-shaped flowers 2-3 cm long from May to June.