Phonetic name Hongdaji

English name RADIXKNOXIAE

Source: This product is the dried tuber of Knoxiavalerian Noidesthoreletpitard, a Rubiaceae plant.

Digging in autumn and winter, removing fibrous roots, washing, slightly scalding in boiling water and drying.

Characteristics This product is slightly spindle-shaped, occasionally branched, slightly curved, with a length of 3 ~10 cm and a diameter of 0.6 ~1.2 cm. Its surface is reddish brown or reddish brown, rough and with twisted longitudinal wrinkles. There are often tiny stem marks at the top. Solid, with reddish brown skin and brown wood. Odorless, sweet and slightly pungent.

Identification (1) Cross section of this product: cork cell sequence. The phloem is broad. Form a layer and form a ring. The xylem vessel bundles are arranged intermittently in radial direction, and those near the cambium are composed of several rows of vessels, which are gradually single or scattered inward. The radiation is wider. Mucous cells containing needle crystal bundles of calcium oxalate and secretory cells containing reddish-brown substances are scattered in parenchyma.

(2) Take the powder of this product 1g, put it in a test tube, add water 10ml, boil it for 1 0min, filter it, add sodium hydroxide test solution1drop to the filtrate, it turns cherry red, and then add hydrochloric acid dropwise for acidification, and it turns orange yellow.

Processing to remove impurities, cleaning, moistening thoroughly, cutting into thick slices and drying.

Sexual taste and channel tropism are bitter and cold; There is a little poison. Enter lung, spleen and kidney meridians.

Function and indications: purging water and expelling drinking, relieving swelling and resolving hard mass. Used for hydrops in chest and abdomen, adverse defecation, carbuncle, swelling, sores, and phlegm.

Usage and dosage1.5 ~ 3g. Store in a cool and dry place.

Remind you: Euphorbia humilis, a Chinese herbal medicine, comes from the Internet. Please follow the doctor's advice before using it.