Hi, Suresh ji,
The pteridophytes are vascular plants (plants with xylem and phloem) that neither flower nor produce seeds, hence they are called vascular cryptogams. Instead, they reproduce and disperse only via spores as per link: http://en.wikipedia.org/wiki/Pteridophyte
While Pleopeltis is the genus, which includes many species, including Pleopeltis polypodioides as stated in your link, as per link: http://en.wikipedia.org/wiki/Pleopeltis
Forwarding again for Id assistance please.