|Pharmaceutical Name:||Herba spirodelae|
|Botanical Name:||Spirodela polyrrhiza (L.) Schield.|
|Common Name:||Spirodela, Duckweed|
|Source of Earliest Record:||Shennong Bencao Jing|
|Part Used & Method for Pharmaceutical Preparations:||The whole plant is gathered in summer, cleaned and dried in the sun.|
|Properties and Taste:||Pungent and cold|
|Meridian:||Lung and urinary bladder|
|Functions:||To promote sweating and release the exterior
To bring measles rash to the surface and relieve itching
To remove water and reduce swelling
|Indications and Combinations:||1. Wind-heat type of exterior syndrome.
*Use with Schizonepeta (Jingjie), Mentha (Bohe) and Forsythia fruit (Lianqiao).
2. Measles without full expression of rash.
*Use with Mentha (Bohe), Arctium fruit (Niubangzi) and Cicada slough (Chantui).
3. Wind-heat type of incomplete rashes and itching of the skin.
*Use with Mentha (Bohe) and Arctium fruit (Niubangzi).
4. Edema and difficult urination accompanied by exterior syndrome.
*Mashed and taken alone.
|Cautions:||This herb is contraindicated in cases with weak constitution and spontaneous sweating.|