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Xanthate Morphology
May 21, 2018

Herbs: The dried tubers are round or round-shaped slices, 2.5 to 6 cm in diameter, 4 to 7 cm in length, and 0.5 to 1.5 cm in thickness. The surface is dark brown, with wrinkles, short dense roots and yellowish-white circular root marks. Microprojections, about 2 mm in diameter. A part of the cork is exfoliated. After the fall, it shows a yellowish, smooth central column. Sections are light yellow to yellow brown, smooth or granular uneven. Quality crisp, easy to break, cross-section Tan or granular. Gas slightly, bitter.

It is better to have a dry body, a large piece, a grayish black skin, and a yellow-white cross-section. The ancient herbs of the "Materia Medica" have different records and are mixed with red herbs. Today, the commodity Huangxiezi is mainly composed of the above-mentioned varieties. Although it is not included in most of the "Materia Medica," it is completely consistent with the description and graphics of the Huangyazi contained in the "Materia Medica Primitive" of the Ming Dynasty. Re-testing the specimens of Medicinal Huang Dizi collected in the Palace Museum of Beijing in the same year, that is to say, shows that it has been used for a long time.

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