Abstract: Pollen morphology of the Chinese montyhpic genus Dichotomanthes ad its out-group Pinsepia utilis were investigated from the point of view of pollen development. The SEM observation revealed that there is not any change i morphology and sculpture of pollen grains from the young pollen grain speerated from callose of tetraspore to the mature pollen grain in Dichotomanthes tristaniaecarpa.Only the volume of pollen grain increased with maturity. In Prinsepia utilis,However,the appearance of pollen grains in young and mature stage varied a great deal. The mature pollengrains are amb 3-lobed circular,equatorial outline shaped as sheroidal,exine sculpture with parallel striate. The young ones,however,have a rather special apperance:amb 3-deep lobed circular and with the angulaperturate.

Key words: Dichotomanthes, Pollen morphology, Systematic, Prinsepia utilis