Abstract: This paper revises the generic diagnosis of Amyelon, given by Cridland in 1964, and gives a minute description about the first species of Amyelon from China. Although there is a differenee in size of secondary tracheids of A. radicans known from other parts of the world, yet they belong to the same species. In this paper, statistical method is used in discription of secondary xylem rays.

Key words: Amyelon radicans, Emended generic diagnosis