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What kind of grass is this? Did it work?

Oxalis albiflora

Oxalis. : Oxalis. Oxalis, also known as Oxalis, is a perennial herb of Oxalis in Oxalis, with creeping roots; Leaflets 3, obcordate; Flowers are usually white and solitary.

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. It can be used as medicine, and has the effects of clearing away heat and toxic materials, reducing swelling and resolving hard mass. [ 1]

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Hundred flowers cluster Jiang Cao [2]

Latin scientific name

Oxalis.