236 FERNS : BRITISH AND FOREIGN. 



1-2| feet long. Veins pinnate; venules free. Receptacles 

 punctiform, terminal. Sori exserted. Special and accessory 

 indusia conniving, and forming a calyciform, pedicellate, vertical 

 extrorse cyst. 



1. D. prolifera, Hook, et Grev. Ic. Fil. (corrig.) ; Hook. Gen. 

 Fil. t. 44 B ; Hook. Fil. Exot. t. 82 ; Lowe's Ferns, 8, 

 t. 38. Dicksonia prolifera, Kaulf. Deparia Macrasi, 

 Hook, et Grev. Ic. Fil. 1. 154. Sandwich Islands. 



125. SITOLOBITJM, Vesv. 



Vernation uniserial and sarmentose. Fronds bi-tripinnatifid, 

 2-6 feet high. Veins simple or pin- 

 nately forked, the exterior venule, or 

 more, soriferous. Receptacles punc- 

 nft tiform, terminal. Sori globose, re- 



flexed. Special and accessory indusia 

 united and forming a reflexed, entire, 

 or cub-bilabiate cup. 



1. S. punctilobum, /. Sm. BTe- 



phrodium punctilobulum, 

 Michx. Aspidium punctilo- 

 bulum, Sw. Dicksonia punc- 

 tiloba, Hook.; Lowe's 

 Ferns, 8, t. 42. Dicksonia 

 pubescens,c/ifc. Fil. 1. 131. 

 Dicksonia pilosiuscula, 

 Willd. Sitolobium pilo- 

 siusculum, Desv. ; J. Sm. 

 Gen. Fil. Dennstaedtia 

 punctilobula, Moore. 

 North America. 



2. S. adiantoides, /. 8m. Dick- 



sonia adiantoides, Humb. ; 

 Hook. Sp. Fil. t. 26 B. 

 Polypodium globuliferum, 

 Poir (Plum. Fil. t. 30). 

 Genus i25.-Portion of fertile Dennstaadtia adiantoides, 



frond, under side. NO. 2. Moore. Tropical Amenca. 



