POLYPODIACE.E. 275 



Plate 3. Fig. 1. Part of a frond, of the natural size. 1 a. Dorsal 

 view of a portion of the same. 1 b. Smaller portion, showing a 

 single sorus. 1 c Sporangium.— The dissections more or less mag- 

 nified. 



5. SlTOLOBIUM TENERUM. 

 Dichsonia tenera, Presl, Tent. Pterid. p. 136, t. 5, f. 6 & 7 j Hook. Gen. Fil. t. 61, A. 



Hab. On the Organ Mountains, Brazil. 



We have in our possession specimens of Dichsonia adiantoides, 

 Link., procured from the Royal Botanic Gardens, Berlin, with which 

 our Brazilian plant perfectly agrees ; arid the latter, on the other hand, 

 corresponds equally well with the DicTcsonia tenera, Presl, as figured 

 in Hooker's Genera Filicum. The indusium is cup-shaped, but some- 

 times it shows a slight disposition to be two-lipped. 



6. SlTOLOBIUM RUBIGINOSUM, J. Sm. 



Sitololium rubiginosum, J. Sm. in Lond. Jour. Bot. 1, p. 434. 



Dichsonia rubiginosa, Kaulf. Enum. Fil. p. 226; Hook. Spec. Fil. 1, p. 79, t. 27, A, 



Hab. On the Corcovado, near Rio Janeiro, Brazil. (All the speci- 

 mens are destitute of sori.) 



7. SlTOLOBIUM SCANDENS? 



S frondibus tripinnatis mernbranaceis glabris; pinnw oppositis sessili- 

 bus remotis patentibus oblongo-lanceolatis acuminatis; pmnulis sub- 

 oppositis oblongo-lanceolatis pinnatipartitis, segmentis subdimidiato- 

 oblongis obtusis obtuse lobato-dentatis ; rhaclii primana strammea 

 angulata partialibusque aculeatis; costa rufo-hirsuta ; vents tenmbm, 

 vemdis dichotomis. 



Dichsonia scandens, Blume, Enum. Plant. Jay. 2, p. 240? Hook. Spec. Fil. 1, p. 78- 



