|| Perennial . Height 8~20cm. The leaves are opposite leaf arrangement , length 2~5cm, pentagon -shaped heart -shaped width 1.5~3.5cm. There is a petiole , irregular shallow indentations there are several edges. On the back side of the leaf has a hair in the vein . The upper part of the stem attached to the lips -shaped flowers and several whorled in leaf axils . In length about 2cm~2.5cm of lips valve flower , flower tube pale purple to purplish . The petals fall streak of deep purple . Upper lip is shallow 2 crack , lower lip 3 crack , central lobe is cut into more finely . Calyx 5 Fuka裂to lobes pointed cilia grows sharply . Spread sideways out a runner ( branch rushed ) from the base after the flower . Bugleweed or twelve-layered ceremonial kimono ( twelve-layered ceremonial kimono ) is the same ajuga and the like . Japanese name is named after that the shape of the leaf is like a fan .