Coltsfoot Flower (Kuandonghua)

Common Knotgrass (Bianxu)

Pharmaceutical Name: Herba Polygoni Avicularis
Botanical Name: Polygonum aviculare L.
Common Name:Polygonum
Common knotgrass
Source of Earliest Record: Shennong Bencao Jing
art Used & Method for Pharmaceutical Preparations: The aerial parts of the plant are gathered in summer and dried in the sun.
Properties and Taste: Bitter and slightly cold
Meridian: Urinary bladder
Functions: To promote water metabolism and regulate abnormal urination
To expel parasites and stop itching
Indications and Combinations: 1.     Damp-heat in the urinary bladder manifested as scanty urine with blood, painful urination, urgency of micturition and frequent urination.
*Use with Pink (Qumai), Clematis stem (Mutong) and Talc (Huashi) in the formula Bazhen San.

2.  Eczema and trichomonas vaginalis.
*The decoction is used externally for washing.
Dosage: 10-15 g