Tu-er-feng ( ?? ?? ?? ) is one of famous Chinese folk medicines in Sichuan prov. ( ?? ?? ?? ) for common cold with cough, rheumatism, etc. Its sources are said to be either whole plants of some Gerbera or Ainsliaea species of family Compositae. In the recent markets, two types of Tu-er-feng are surely available. In this paper, Tu-er-feng derived from Gerbera species are studied to clarify the botanical origin ; comparing mainly with the internal morphologies of the leaves and roots of G. piloselloides, G. delavayi, G. nivea, G. anandria (=Leibnitzia anandria) and G. jamesonii. As the result, G. piloselloides is determined as the botanical origin of Tu-er-feng obtained from the recent 16 markets.
