Abstract:Three alkaloids were isolated from the whole plant of Phlegmariurus fordii (Baker) Ching. One of them was identified as known Iycodoline. The other two, named phlcgmariurine A, and phlegmariur!ne B, are new alkaloids. The structure of A, was determined by means of spectral analysis and X-ray diffraction. It was proved to be a new tri-cyclie alkaloid as (Ⅰ). The structure of B, was elucidated as (Ⅱ).