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Cycadoficales

1.Lyginopteris Oldhamia T.S. stem older

2. Lyginodendron T.S. Stem

3. Lyginopteris Wood-L.S.

4. Calmototheca Stem T.S.

5. Rachiopteris Aspera with V-shaped xylem

6. Sphenopteris-Young

7. Kaloxylon Hookeri-Old stage

8. Kaloxylon Hookeri-Young stage

9. Lageno Stoma L.S. Cupule

10. Heterangium-Young with characterstic X1

11. Heterangium Stem T.S.

12. Schopfiastrum Decussatun

13. Colpoxylon-the rare genus with branching

14. Medullosa Stem perfect T.S

15. Medullosa Root

16. Myeloxylon T.S. complete scattered bundles

17. Neuropteris distinct T.S. with midrib

18. Pecopteris T.S.

19. Linopteris

20. Cyclopteris T.S.

21. Alethopteris T.S.

22. Mariopteris