Development and Taxonomic Significance of Gametophytes of 2 Species in Arthropteris J.Sm.

The spores of Arthropteris pallisotii and Arthropteris repens were respectively cultured in habitat of soil and knop's.The mature spores were yellow-brown,bilateral type,monolete,kidney-shape in equatorial view and elliptical in polar view with a loose wrinkled perines.The spore germianation pattern of both species was of the Vittaria-type.It occured about 8 days after inoculation.The gametophyte development was of the Aspidium-type.Filamentous growth appeared within 14 days after inoculation and formed a filament of 3～8 cells.Prothallial plates growth appeared within 27 days after inoculation.The young prothallia were not symmetry temporarily,but the mature prothallia were cordate type with one type hair.Antheridia were appeared on prothallus 75 dayrs after inoculation,pelletlike,consisting of three cells.The neck of mature archegonium was composed of 4～5 layers of cells high.The characteristics of spore germination and gametophyte development of A.pallisotii and A.repens were relatively advanced.