rHARACTERS OF TKinES AXD ORNEP.A. i\) 



Tribe 19. AulAM'E.E. 



Gen. -. Ex. AJiantum, Flewardia. 



Tribe 20. — Cheilanthe.'E. 

 Gen. S. Ex. Cheilanthes, Pellcw, Cassebeern. 



Tribe 21. — Pteuideae. 

 Gen. 8. ]'jX. Pteris, Liluhroclna, LoihclntU. 



Tribe 22.— Bleuhne.k. 

 Gen. 11. Ex. BlecJinum, Lomaria, Woodwardia. 



Tribe 23. — Asplenie^T!. 

 Gen. 12. Ex. Asplenviim, Scolopendriam, Diplradurn. 



B. Eing- of sporangia, horizontal, central. 



Tribe 24. — Gleichekiejo. 

 Gen. 4. Ex. Gleichenia, ifatuiiia. 



Tribe 2-5. — E[yme>;ophtlle.:E. 

 Gen, -1. FJx. Hymenopiiijlliiiii, Tricliomanes. 



C. Ring of sporangia liorizontal, apical, in some 

 incomplete. 



Tribe 26. — Schize.b. 

 Gen. 8. Ex. Schiza'a, Anemia, Lijgodium. 



Trihe 27, — Osmundace^i;:. 

 Gen. 2. Osniunda, Todea. 



D. Sporangia destitute of a ring. 



Division III.— SCAPHOBRYA. 

 Fronds terminal, rising from between two stipuliform or 

 socket-like appendages, and articulate witli the caudex. 



Tribe 28. — Marattia ce.e. 

 Gen. .J. Ex. Mara.ltia, Danea, Augiopteris. 

 2. Evolution of the fronds straight. 

 Tribe 20. — Oi'eioitEOssACE.E, 

 Gen, 3. Opliiegtosswii, IIchiu}tllioslac/nis, BotrijcJiium. 



