what stores carry berberine

Coptis has three varieties, taste even (xi called "Chicken Claw Lian"), Toideae, Yun Lian

Taste even, most of the medicinal herbs clustered into clusters, often curved, shaped like a chicken claw, Xi called "Chicken Claw Lian", its single rhizome length 3-6 cm, diameter 0.3-0.8 cm. Surface roughness, irregular nodular uplift, fibrous roots and fibrous roots residues. 

The smooth surface of the internodes, such as STEM, Xi called "Bridge". The upper part of a lot of brown scaly leaves, the tip is often left with residual stems or petioles.

 The surface is grayish yellow or tan. Hard, irregular section, the skin orange red or dark brown, the wood is bright yellow or orange yellow, a radial arrangement, the medullary part is sometimes hollow. The air is tiny and tastes extremely bitter.
Main production in China, Chongqing, Sichuan, Hubei, Guizhou, Shaanxi and other fields.

Toideae, the medicinal herbs are single branch, slightly cylindrical shape, such as "silkworm shape", micro-curved, 4-8 cm long, diameter 0.5-1 cm, "bridge" longer, 1-3 cm. There are a few residues on the top. 

To the body dry, stout, without root, shaped like silkworms for Jiapin.
The main production is in Sichuan province, China. 

Yun Lian, the medicinal herbs curved hook-like, shaped like "scorpion tail", more than a single branch, smaller. Length ca. 2-5 cm, 1.5-4 cm in diam., Internodes densely. To dry, fine, more nodes, less fibrous roots, color yellow is jiapin. The main production is in Yunnan province, China.