Abstract: The spores of Arthromeris lungtauensis Ching were respectively cultured in Habitat of soil, Knorp’s and MS. The spore germination and gametophyte development were observed under microscope.The results showed that the spores are yellowish, bilateral type, monolete, warty perines with spinosity，kidney-shape in equatorial view and elliptical in polar view. The spores germianated within 5 days after inoculation, the type of germination is Vittaria-Type while that of gametophyte development is Drynaria-Type. Filamentous growth appeared within 7 days after inoculation,Its length were 3-8 cells; Prothallial plates growth appeared within 2 weeks after inoculation, A long broad spatulate prothallial plate is formed with 6-8 cells broadth; Young prothallus growth appeared after 6 weeks after inoculation，Adult prothalli are Cordate-thalloid with two type hairs (unicllular papillate hair and 4-5 cells fromed branche hair) and bifurcate rhizoids, Antheridia were appeeared on prothallus within 9 weeks after inoculation. It appeared and matured about 1 week earlier than archegonia. Antheridia are short width handle. Archegonial neck usually short curves. They indicated that adult prothallus with hairs, bifurcate rhizina and curve archegonium are some the evolution characteristic. The paper preliminary discusses its taxonomic significance.

Key words: Arthromeris lungtauensis Ching, spore germination, gametophyte development, taxonomic significance