The Sisymbrium (Sisymbrium luteum) belongs to Brassicaceae (the Mustard family). It is a perennial herb that is distributed in Honshu and Kyushu in Japan, the Korean Peninsula, northeastern China, and eastern Siberia. This herb grows on the forest edges in the mountains and can reach 60-120 cm in height. The leaves are ovate-lanceolate or lanceolate, with large serrations and short petioles. The yellow four-petaled flowers bloom on the racemes at the tips of the branches from June to July. The fruit is siliques, 7-14 cm long.