The development of gametophytes of Dryopteris fragrans Study on in vitro Propagation of Endangered Plant Phyllitis japonia Study on in vitro Propagation of Endangered Plant Phyllitis japonia Improvement of Paraffin Section Methods and Morphological Studies on Usnea betulina Phototropism of Thalli and Rhizoids Developed from the Thallus Segments of Bryopsis hypnoides Lamouroux Conditional optimization and kinetic research on producing huperzine A using Huperzia serrata in vitro Culturing the Segments of Bryopsis hypnoides Lamouroux Thalli Regenerated from Protoplast Aggregations