The Rhizome of Winged Yam, also known as Shenshu, Lidong Potato, Big Potato, and Potato Seed, is the tuber of Dioscorea opposita. Pseudo-yam is sweet, flat and non-toxic. Its form is: ginseng potato, perennial twining herb. Tubers are fleshy, up to 60 cm long, with various shapes and colors. Stems sharply quadrangular or with 4 narrow wings, smooth and glabrous. Leaves opposite; Reiyoshi is often found in the axils of leaves; Leaf blade heart-shaped oval to heart-shaped oblong, lobes nearly round, 8 ~16 cm long. It is 5 ~ 8 cm wide, with an acute apex and a heart-shaped base with 7 ~ 9 veins. Cultivated or wild. Distributed in Fujian, Guangdong, Guangxi and other places. Indications for diarrhea due to spleen deficiency; Kidney deficiency nocturnal emission; Take it down; Frequency of urination; Cough due to fatigue; Quench thirst; Ulcer and ulcer; Soup fire injury. Has the functions of invigorating spleen and stopping diarrhea; Benefiting lung and nourishing kidney; The efficacy of detoxifying and healing sores.