Studies on the Spore Morphology of Polypodiodes Ching (Polypodiaceae) from Southwest,China

The spores of 11 species(including 1 variety) of Polypodiodes Ching were examined under LM and SEM,and most of the species were studied for the first time.The spores of Polypodiodes are monolete,bilaterally symmetric,elliptic in polar view and kidney shaped or semirounded in equator view.Based on the spore morphology,the relationships between P.wattii and P.niponica,P.microrhizoma and Metapoly-(podium) manmeiense were also discussed,providing the palynological to the systematics of Polypodiodes.According to the study at the palynology of this genus,we concluded that Polypodiodes is a natural taxon and agreed with Ching’s point in 1978.