Abstract: The present work is an extension of a series of the eytotaxonomical studics on Chinese ferns. Chromosome counts of 25 species of pteridophytes from Emei Shan (Mt. Omei), Sichuan, Diancang Shan, Yunnan and Wuling Shan, Beijing have been made. They are summarized in the Table 1. The chromosome numbers of following 15 speceis are recorded for the first time: Selaginella labordei n=8, S. omeiensis n=8. Hyminophyllum omeiense 2n=42, Adiantum refractum n=30, Coniogramme maxima n=60, Athyrium dubium n=40, A. imbricatum n=40, A. kweichowense n=40, Lu- nathyrium wilsoni n=40, Pseudophegopteris pyrrhorachis var. glabrata n=31, Woodwardia omeiensis n=34, Struthiopteris eburnea n=33, Ctenitis heterolaena n=41, Polypodiodes pseudo-amoena n=37, Lepisorus eoaetaneus n=70, and other 4 species represent new cytological races.

Key words: Pteridophytes, Chromosome number, Struthiopteris, Polypodiodes