Agastache rugosa (Fisch. et Mey.) O. Ktze
It is 0.5~1.5m high, quadrangular, and 7~8mm thick. Its leaves are ovate to oblong lanceolate, and its corolla is light purple blue, about 8mm long. The mature nuts are oval and oblong, about 1.8mm long and 1.1mm wide. The flowering period is from June to September, and the fruit period is from September to November.