Frostwort, (Cistus Canadensis or Helianthemym canadense) is a member of the Cistaceae family. It can be found in the esatern United States as well as Europe. The herb can be used for medicinal purposes. Frostwort contains tannins and the glycoside helianthinin. Frostwort is still being studied. Thus far, it is thought to have astringent and tonic effects on the body. This has lead to its use for digestive disorders.