The root of Mirabilis jalapa Linn. is the dried root of Mirabilis jalapalinn. of Mirabilis jalapalinn. Digging in autumn, removing fibrous roots, washing and drying. Characteristics This product is spindle-shaped or conical, with a diameter of 2 ~ 7 cm, brown to dark brown outer surface, shriveled, hard, not easy to break, grayish white to grayish brown cross section, granular, with several obvious concentric rings. It smells sweet and tastes sweet. Identification Take this product powder 1g, add methanol 10ml, perform ultrasonic treatment for 30 minutes, filter, and take the filtrate as the test solution. Another control medicinal material 1g was taken from the root of Mirabilis jalapa, and the control medicinal material solution was prepared by the same method. According to the test of thin-layer chromatography (Appendix 1 of China Pharmacopoeia), absorb 5μl of each of the above two solutions, respectively spot them on the same silica gel G thin-layer plate, use toluene-ethyl acetate (5: 1) as developing agent, take them out, spray 25% phosphomolybdic acid ethanol solution, and heat them at 105℃ until the spots become clear. In the chromatogram of the test sample, the spots with the same color appear at the positions corresponding to the chromatogram of the control medicinal materials. Check the moisture according to the moisture determination method (the first method in the appendix of China Pharmacopoeia), and it shall not exceed 10.0%. The total ash content shall not exceed 12.0% (Appendix 1 of China Pharmacopoeia). The acid-insoluble ash content shall not exceed 1.0% (Appendix 1 of China Pharmacopoeia). The extract shall be determined by the cold immersion method (Appendix 1 of China Pharmacopoeia) under the water-soluble extract determination method, and shall not be less than 13.0%. Sexual taste and meridian tropism are slightly sweet, numb and cool. Return to liver, stomach and bladder. Sexual taste and meridian tropism are slightly sweet, numb and cool. Liver, stomach and bladder meridian. Function and indications: clearing away heat and promoting diuresis, promoting blood circulation and reducing swelling. Used for breast carbuncle, leucorrhea with reddish discharge and irregular menstruation; Hot shower; Carbuncle, sore, swelling and toxin. Usage and dosage10 ~15g. Appropriate amount for external use. Store in a dry place.