Phylogeny
, the Checklist of Ferns and Lycophytes of the World recognized the following species: • P. anetioides Benedict • P. dussianum Benedict • P. intramarginale (Baker ex Jenman) Alston • P. jenmanii Benedict • P. ophioglossoides (Lellinger) S.Linds. • P. quadriseriatum Benedict • P. urbani (Brause) Alain ==References==