Phylogenetic position of the monotypic genus Metapolypo- dium Ching endemic to Asia: evidence from chloroplast DNA sequences of rbcL gene and rps4-trnS region Adaptive Evolution in the Chloroplast Gene rps4 in Ferns Molecular phylogeny of Colysis (Polypodiaceae) based on chloroplast rbcL and rps4-trnS sequences Relationship Between Pteris fauriei and Pteris biaurita Based on rps4-trnS Region Sequences Analysis Evaluation of ten plant barcodes in Bryophyta (Mosses) Phylogeny of Ptychostomum (Bryaceae, Musci) inferred from sequences of nuclear ribosomal DNA internal transcribed spacer (ITS) and chloroplast rps4 Phylogenetic Analysis of Cheilosoria Trevis. Based on Four Chloroplast DNA Sequences