Qingdai

Not to be confused with Qingdao.

Qingdai (青黛), a traditional Chinese medicine, is derived from dried leaves and stems of baphicacanthus cusia (Nees) Bremek., Polygonumtinctorium Ait., or Isatis indigotica Fort.

Qingdai was first recorded in Yaoxinglun.

References

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