A molecular phylogenetic study of Huperziaceae based on chloroplast rbcL and psbA-trnH sequences Spore Morphology of Pteridophytes from China XI.Huperziaceae Observations on the Spore Morphology of Three Huperzia Berm. Species Cloning and sequence analysis of L-lysine decarboxylase gene in Huperzia serrata var. longipetiolata