Drynaria Rhizome

Source Rhizome of Drynaria fortunei (Kunze) J. Sm. or D. baron ii (Christ) Diels, family Polypodiaceae

Producing Areas Shanxi, Hunan, Gansu, Guangdong, Qinghai, Sichuan, Zhejiang

Properties Bitter, Warm

Channels Kidney, Liver


  • Tonifies the liver and kidney, activates blood circulation and expels wind-dampness
    For deficiency of liver and kidney, or sluggishness of blood circulation manifested as rheumatism and weakness of the back and knees, and kidney-deficiency syndrome manifested as toothache, dizziness, tinnitus or chronic diarrhoea. Also used to treat poisoning by streptomycin and kanamycin with symptoms of headache, tinnitus and deafness.
  • Restores the bones and tendons
    Treats fractures and trauma. External use of fresh herb for tinea infection. If prepared with wine, can be used to treat alopecia.

Usage and Dosage
6–15 g is used in decoction for oral use. 15–30 g is used when fresh herbs are used. Also used in pills and powder. For external use, dried herb or herb (paste or pounded) mixed with wine can be applied.

Used with caution in the case of flaming-up of fire due to deficiency of yin and lack of blood stasis.

Keep in a dry and well-ventilated place.
Protect from dampness.

Description of Quality Herb
A good rhizome is thick and brown in colour.