174 J. SMITH ON THE GENERA OF FERNS. 



Canariense, fVilld. 14. A. prsemorsutn, Sw. 15. A. falca- 

 tum, Lam. 16. A. serra, Lang, et Fisch. 



must. Hook. Gen. Fit. t. 30. Hooh. et Grev. Ic. Fil. t. 136. 



*** Dare A, Willd. 



Fronds simple^ acutely laciniated, pinnate or hi-tripinnatijld ; 

 sovi usually solitary in each ultimate segment. 



Examp. 17. A. flaccidum, Forst. 18. A. Odontites, R. Br. 

 19. A. laxum, R. Br. 20. A. rutaefolium, (WiUd.) 21. A. 

 bulbiferum, Forst. 22. A. diversifolium, Cunn. 23. A. rhizo- 

 phylluni, {Coenopteris, Sm.) 24, A. myriopbyllum, Spreng. 



Illust. Hook. Gen. Fit. t. 6. Hook, et Grev. Ic. Fil. t. 193. 



**** Athyrium, Roth. 



Fronds bi-tripinnatijid, ultimate segments dentate or deeply 

 laciniated; sori short, generally occupying the middle or lower 

 part of the vemdes, sometimes the lower exterior venules sori- 

 ferous on both sides; indusium vaulted^ its extremities free. 



Examp. 25, A. fontanum, R. Br. 26. A. filix-foemina, -K. 

 Br. 27. A. Athyrium, Spreng. 28. A. Brownii, J. Sm. 

 (AUantodia australis, R. Br.) 29. A. umbrosum, (Allan- 

 todia, R. Br.) 30. A. spectabile, (AUantodia, Wall.) 31. 

 A.multicaudatum, ( Wall.) 32. A. incisum, (AUantodia, Wall.) 



Rlust. Hook. Gen. Fil t. 16. Schk. crypt, t. 58, 59. 



Ohs. The circumstance of some of the species of this sec- 

 tion having very short sori, with the ends of the indusium 

 free and curved, is somew^hat analogous to Nephrodiuni and 

 Cystopteris in the following tribe ; but the difTerence of at- 

 tachment of the indusium readily distinguishes them. For 

 further observations respecting Asplenium, see page 171. 



Sect. II. Symplophlebie^. 

 Venation variously anastomose, or reticulated. 



70. Ceterach, Willd. J. Sm. 

 (Gymnogrammatis sp. Spreng. Presl.) 

 Veins forked; venules anastomosing; sporangia unilateral; 



