ITEBIDE2:. xli. 



oonuiTent over the narrow tdtimate Begments. Veims (sterile) 

 Bunple and oosteeform in the ultimate segments ; or (fertile) pin- 

 nate from a central costa, the few branches united near the 

 margin by the transTerse receptacle. 



Fronds bi-pinnately or decompoundly piunatiseoted, some- 

 times sub-membranaceous, usually with small narrow segments. 

 Khizome creeping. — ^A email group of elegant ferns, with 

 decompound fronds, and small ultimate segments, the fertile 

 parts Boriferous along the margins. 



Ex. : 0, axiratum, S2fs. I O. lucidmn, Spr. 



O. strictuin, Kze, \ 0. melanolepis, Sjie, 



50. OCHROPTERIS, J. Smith, SooTc.Jown. Sot. it. 158. 



Adtattti sp., Swa/rtz; Ckeilanthis 8p., Bory ; Cassebeee^ sp,, A, 

 Sraun Hb,, (FhJ ; Ptekldis sp,, Metteniui, 



Son indusiate, transverse marginal, oblong or sub-orbicular, 

 occupying the apices of the lobes j the receptacle transversely 

 combining the apices of from two to four converging venules. 

 Indtismm of the same form, consisting of the reilexed scarcely 

 altered margin. VHns forted from a central costa ; venules free. 



!Fronds large, decompound, coriaceous. Stipes and rachis 

 pallid. Khizome short decumbent. — A genus of large compoimd 

 ferns, with slight, technical characters to distinguish it from 

 Pteris, beyond the comparative shortness of the sori. 



Ex, : 0. pallens, J. Sm. 



51. HAPLOPTERIS, Presl, Tent. Ftend. 141. 



Pteeidis sp., Bory J TjEiflopsmis sp., J. Smith; Pteeopsidis sp., JDe«- 

 vaux ; VlTTAEl^ sp,, Mettenius. 



Sori indusiate, Unear, continuous, on a transverse marginal 

 receptacle. Indusmm broad firm marginal, inflexed, i.e. opening 

 on the inner side (pteroid). Veins simple, from a central costa, 

 remote, internal, combined in the fertile fronds by the receptacle. 



Fronds simple, coriaceous, fasciculate. Hhizome sub-globose. 

 — ^The internal dehiscence of the indusium at once distinguishes 

 this from the Vittanece, while the presence of the indusium 

 equally separates it from the Tcenitidece, with each of which it has 



