About eleven taxa in the genus Woronichinia(Cyanophyta) have been reported worldwide as yet.However, only two species were found in China, and the taxonomic information about this genus in China was unclear.Based on field samples and the isolated strains from Chinese lakes, the present study described morphological characters for both the Woronichinia genus and type species Woronichinia naegeliana.The comparison among Woronichinia and its related genera Microcystis and Coelosphaerium was also conducted.