1. It is land—growing, positive pteridophyte.

2. The components and ecological characteristics of pteridophyte were depicted and the characteristics of flora were analyzed as well.

3. Palaeobotany will introduce the structure and classification of Pteridophyte, Gymnosperms and Angiosperms, and introduce the evolvement phases of the Plants.

4. Through investigations of pteridophyte resources in Beijing area, 16 families, 19 generas, 33 species and 2 varieties are founded.

5. Based on the investigation of the wild pteridophyte resources in Quanzhou , there exits58 species of medicinal ferns.

6. Some suggestions on farther development and utilization of pteridophyte resources are put forward.

7. It indicated that there were 59 pteridophyte in Laoling Nature Reserve, belonging to 14 families and 23 genera.

8. The results support Ching Renchang's view that the pteridophyte floristics in Mt. Dabie of Henan Province should be classified into Central and East Chinese fern flora.

9. The classification, composition and characteristics of pteridophyte flora in Zhongpo National Forest Park have been researched.

10. The invention is suitable for large-scale production and can be widely used for separation and purification of polysaccharide and glycoprotein of all kinds of pteridophyte.

11. Objective To study the species and geographical distribution of Osmundaceae, Gleicheniaceae and Dennstaedtiaceae medicinal pteridophyte in Guizhou.

12. This report expounds the species, floristic relation, ecologic distribution and utilizing value of pteridophyte resources.

13. Investigations demonstrated that there are 103 species of wild pteridophyte, which belong to 53 genera 0f 29 families in Jiuhuashan of west Zhejiang.

14. ResultsWe made clear the species and geographical distribution of Osmundaceae Gleicheniaceae and Dennstaedtiaceae medicinal pteridophyte in Guizhou.

14. try its best to gather and build good sentences.

15. Based on the field investigation and reference collection, the floristic analysis of pteridophyte in Niumulin Nature Reserve was studied.

16. The taxon numbers, characteristics and distribution types of Guangxi pteridophyte flora are discussed in present paper.