626 FILICE3. 



With Cyathea, it agrees in the indusium being continuous 

 and nearly entirely capsulis substratum ; besides which, the 

 sori are occasionally, especially towards the ends of the pin- 

 nae, decidedly intro-marginal \ with no inflexion of the margin 

 of the frond. But in these instances we may assume that 

 the formative force is partially expended, and that in con- 

 sequence of this, the indusium assumes a simpler form. 



In one instance I have seen a real Cyatheous indusium, 

 with an inflexed process of the margin, equitant on the in- 

 dusium. see fig. 8. 



PI. CXXX1. Fig. I. 



1 . Frond rather larger than natural size. 



2. Portion of pinna. 



3. Ditto ditto more enlarged. 



4. Sorus and portion of pinna shewing a subbilabiate de- 

 hiscence of indusium. 



5. Sorus and Ditto shewing that it is not always margi- 

 nal. 



6. Sorus and Ditto shewing a genuine Cyatheous form. 



7. Section of sorus > the capsules ought to be nearly ses- 

 sile. 



8. Shew an equitant, but free inflexed margin of leaf and 

 Cytheous sorus. 



9.,9. Capsules. 

 10. Sporules. 

 Seharanpore Dec, 26, 1840. 



Cyatheoides, PI. CXXIX. Fig. II. 



1. Portion of frond. 



2. Do of pinnula upper surface. 



3. Do under. 



