Sixteen pollen samples from 11 species and 1 form of the genus iradiclis B1．were examined under LM， SEM and TEM ．Results revealed that pollen grains of iradiclis were single， small or medium-sized， spheroidal to prolate，radial symmetry，usually 3-colporate，sometimes 4-colporate，and with perforated tectate. The exine consisted of inconsistent perforated tectate，columellae and foot layer．Both exine and intine were obvious．Pollen dimorphism and bubble-like protrusions were foun d in Spiradiclis．Pollen characters of Spiradiclis have little value for distinguishing infra-genus taxa，but they can provide much information in the phylogenetic relationships among species，e.g.，the taxon having same pollen is more advanced than that having dimorphic pollen．
