Corydalis Corydalis is a commonly used traditional Chinese medicine. Also known as Yuan Hu. It was first recorded in "Kaibao Materia Medica" of the Song Dynasty. The products are mainly cultivated products, but there are still many kinds of wild Yuanhu. It has the functions of promoting blood circulation, benefiting qi and relieving pain. It is used for chest and flank pain, epigastric and abdominal pain, amenorrhea and menstruation, postpartum blood stasis, falling and swelling and pain, etc.

Source: Corydalis yanhusuo w. T. Wang's tubers.

Origin and distribution: Mainly produced in Dongyang, Pan'an, Yongkang and other places in Zhejiang. In addition, it has also been introduced and cultivated in Jiangsu, Shanghai, Hunan, Hubei and other places.

Key points for identification: Authentic Corydalis Corydalis has the following distinctive features: oblate spherical shape, yellow, with reticular wrinkles, stem marks on the top, and umbilical point on the bottom. The texture is hard and brittle, and the cross section is yellow and horny. Very bitter taste.

Two similar tubers of Corydalis corydalis are spherical, slightly smaller, and the rest are the same as the above species. The whole-leaf Corydalis tubers are oblong or conical, slightly longer than the original ones, and have a different texture when cut into pieces (note: this may be due to processing without cooking).

Famous Canon Identification 1. Chen Zangqi of the Tang Dynasty said: "Yanhu Suo was born in the stream and came from Andong Road. Its roots are like pinellia and its color is yellow." 2 Wang Haogu said: "The real name is Xuanhu Suo. To avoid the taboo of Zhenzong of the Song Dynasty, the name Xuan was changed to Yanye. "3 Ming Dynasty? "Mengquan of Materia Medica" said: "Yanhusuo is Xuanhusuo. He came from Andong (belonging to Southern Zhili) and was born in Xi State. To avoid the taboo of the Song Dynasty, he changed it to Yanye. Xuanweiyan. It looks like Pinellia and is yellow in color." 4 Li Shizhen said: "Xi is a native of Northeast China. It is planted in Longdong in the west of Ermao Mountain. It is planted after the cold dew every year. It grows seedlings after the beginning of spring. The leaves are like bamboo leaves and grow three in March. Inch high, the roots are clustered like taro eggs, and they are dug up in the beginning of summer. "5 Qing Dynasty" "Compendium of Materia Medica": "Yanhusuo, the roots are like pinellia, the flesh is yellow, small and firm."

Quick identification. Most of the tubers are irregular oblate spherical shapes with a diameter of 0.5-2cm. The surface is gray to yellow-brown, with irregular network wrinkles, a slightly depressed stem mark at the top, a slightly sunken umbilical shape in the center of the bottom, and some conical protrusions at the bottom. It is hard and brittle, with a yellow cross-section and a horny appearance. The smell is weak and the taste is extremely bitter.

The best quality is those with large and plump grains, solid texture and yellow cross-section.