Vinegar grass is so common that it can't be more. Pushing grass can be seen everywhere. Its leaves all grow at the top of the stem, and there are only three pieces on each rhizome, like the wings of a helicopter and the bamboo dragonfly that children used to play with. When I was a child, I mowed grass with my partner (the struggle between Zi Ling and the maids in a Dream of Red Mansions is a battle of words, and ours is a battle of war), that is, I pinched off the leaves from bottom to top with the skin of sorrel, and the two hugged each other and pulled each other, and whoever was pulled first lost. The word "powder" of Oxalis is linked with vinegar, and Compendium of Materia Medica also says that it tastes like vinegar, and its stems and leaves are alike. There is a record of "sour pulp" in the newly revised Materia Medica compiled in the Tang Dynasty, saying that this grass was collected in May and can be used as medicine to treat dystocia after drying in the shade. In the past, it was a child's favorite. I have nothing to do but pick a few pieces and put them in my mouth. I feel cool and enjoy it in my mouth. The same is true of children in the Northern Song Dynasty. Su Song said, "When I was young, all children liked to eat.". Scientific name: Oxalis. English name: Creeping Woodsorrel, Oxaliceae name: Oxaliceae is widely distributed, born in roadside grass or fields, in front of and behind the house. China is distributed in the north and south. As a medicine, whole herb has the functions of clearing away heat and toxic materials, reducing swelling and resolving hard mass, and can be used to treat snake and insect bites, hematuria, urinary tract infection, jaundice and hepatitis. Alias: Physalis alkekengi, Physalis alkekengi, Trifluoromethanesulfonic acid, grass hydrochloride, acid dustpan, grass trifluoromethanesulfonic acid, Suaeda salsa, Physalis alkekengi, Physalis alkekengi, Physalis alkekengi, Physalis alkekengi, Physalis alkekengi, Physalis alkekengi, Physalis alkekengi, Physalis alkekengi, Physalis alkekengi, Physalis alkekengi, Physalis alkekengi, Physalis alkekengi, Physalis alkekengi. Remove the sediment and dry it in the sun. Nature and taste return to meridian: sour and cool. Indications: clearing away heat and promoting diuresis, detoxifying and reducing swelling. Used for treating common cold, fever, enteritis, urinary tract infection, urinary calculi and neurasthenia; Externally used for treating traumatic injury, poisonous snake bite, carbuncle, swelling, sore, tinea pedis, eczema, burn and scald. Usage and dosage: 0.5 ~ 2 Liang; Appropriate amount for external use, fresh products are mashed and applied to the affected area, or decocted and washed.