天麻是兰科植物赤箭(Gastrodia elata Bl.)的地下茎的加工品。其植物为多年生草本,喜生于山野。它的地下茎呈肉质块状,地上茎呈黄棕色,高约一米。叶呈鳞状。全体不含叶绿色。花不整齐,呈黄赤色,排列成穗状的总状花序。天麻是治头痛、眩晕、四肢肌肉痛、四肢知觉钝麻,小儿惊癎等症的有效药物。云南昭通专区一带天麻多生于高山密林中,以镇 Gastrodia is a processed product of the underground stem of the gastrodia elata Bl. Its plant is a perennial herb, rejoicing in the mountains. Its underground stems are fleshy, and the stems on the ground are yellow-brown, about one meter high. The leaves are scaly. All leaves do not contain green. Irregular flowers, yellowish red, arranged in spikelike racemes. Gastrodia is an effective drug for headache, dizziness, muscle pain in the extremities, numbness in the extremities, and convulsions in children. Gastrodia elata in the Zhaotong area of ​​Yunnan Province was born in the high mountain jungle, with townships