天麻 Gastrodia elata

天麻是一種植物的塊狀莖，又名鬼督郵、定風草。為一傳統之中藥材，廣泛用於治療頭痛眩暈，肢體麻木，小兒驚風，癲癇抽搐，破傷風。

It is a blocky stem of plants. It is a traditional Chinese herbal medicine widely used for the treatment of headache, dizziness, limb numbness, convulsions in children, seizures, and tetanus.