In the Chinese Herbal Materia Medica, Shan Yao belongs to category of herbs that supplement/tonify, and the sub-category of herbs that tonify qi.
Channels Entered: Kidney, Lung, Spleen
(1) Tonifies the qi and yin of the Lungs, Spleen & Kidney.
(2) Secures the essence.
Common Name: Chinese Wild Yam Root
Pharmaceutical: Radix Diascoreae Oppositae