POLYPODIES. Ixrr. 



sometimes short free, sometimes longer, with the centre one 

 uniting with the next transverse venules so as to form two 

 rows of areoles between the primary veins. 



Fronds simple or pinnate, coriaceous or herbaceous. Ehizome 

 creeping. A group tolerably well-marked by the venation, yet in 

 some of the smaller species approaching Goniophlebium, from 

 which it is distinguished in nearly every instance by producing 

 two sori within the areoles instead of one, and by having medial 

 receptac],s. The anomalous series are found : (1) amongst the 

 smaller ones, when the free veinlets are very short, and thus 

 some of the sori become nearly or quite terminal, while, however, 

 others are distinctly medial ; and (2) in the only pinnate species, 

 in which the sori are distinctly and constantly terminal, but in 

 which the general structure of the venation forbids a separation, 

 from the more genuine species. 



Cyrtophlebium.SoTi distinctly medial on the veins. 



Ex. : C. PhyUitidis, Presl. I C. csespitosum, Link. 



C. repens, Presl. \ C. angustifolium, J. Sat. 



Cephalosorium Sori terminal on the veins. 

 Ex. : C. decurrens, Presl. 



1 1 Free veinlets divaricate. 

 107. NIPHOBOLUS, Kaulfuss, Emm. Fil. 124. 



CYCLOPHOBCT, Desvaux; PYBBOSIA, 3firbel ; CAio>OLLBA l .JftrieZinpart; 

 SCYTOPTBBIS, Presl; CBASPBDABIA, Link in part; SPH.SBOSTICHUM, 

 Presl; PoLYCAMPTOM, Presl; APALOPHLEBIA, Presl; GYBOSOBIUM, 

 Presl; GALEOGLOSSA, Presl; NIPHOPSIS, J. Smith ; POLYPODU sp., Aucti 



Sori non-indusiate, globose cyclose or elliptic, superficial or 

 immersed, buried amongst dense stellate pubescence ; the recep- 

 tltcles terminal or medial on the excurrent free or irregularly 

 anastomosing veinlets. Veins internal obscure, pinnate promi- 

 nent, or uniform, from a central costa; venules anastomosing, 

 sometimes transversely parallel, forming parallelogramoid areoles 

 with excurrent or recurrent free or occasionally connivent or 

 generally anastomosed veinlets ; sometimes uniting in roundish 

 or oblong hexagonal unequal oblique areoles, with variously 



