Giant Knotweed Rhizome and Root

Source Bushy Knotweed Root is the dried rhizome and root of Polygonum cispidatum Sibe,et Zuce (Fam. Polygonaceae)

Producing Areas Jiangsu, Jiangxi, Shandong and Sichuan, etc.

Properties Slightly Bitter, Slightly Cold

Channels Gall Bladder, Lung, Liver


  • Treats jaundice related to heat-dampness
    For jaundice and gall bladder stones.
    Dispels heat and toxic.
  • Treats injuries from burns and scalds
  • Relieves cough due to lung-heat
    For inflammation of the bronchi and lobar pneumonia.
  • Treats traumatic injuries
  • Treats amenorrhea related to blood stasis
    For blood stasis with menses stoppage and menopausal bleeding disorder.

Usage and Dosage
9–15 g is used in decoction for oral use.
The pounded, powder or decoction can be used externally.

Contraindicated for pregnant women.

Keep in a dry place and protect from mould and moths.

Description of Quality Herb
The good one is stout, hard and compact with a yellow core.