XXU. GE1TEBA OP FEBffS: 



14. PHOTINOPTEEIS, J. Smith, HooTc. Jowrn. Sot. 



iii. 403; iv.155. 



Sori superficial, non-indusiate j the receptacles occupying the 

 under surface of the contracted upper pinnse. Veins pinnate 

 from a central costa, prominent ; venules transversely anasto- 

 mosing, forming nearly equal parallelograms; veinlets again 

 anastomosing in unequal sub-hexagonal areoles, and producing 

 divaricate secondary veinlets, which are clavate at the apex, 

 and free within the ultimate areoles. 



Fronds pinnate, coriaceous, fertile and contracted in the upper 

 part ; pinnse articulate, auriculseform on the lower side at the 

 base. Rhizome scandent. A very well-marked genus, remark- 

 able on account of the peculiar base of the pinnse. 



Ex. : P. Horsfieldii, J. Sm. \ P. speciosa, SI. : Pr. 



2. PL&.TTCEBIE.E. 

 (a) Sori in amorphous patches. 



15. PLATYCEBITJM, Desvaux,Ann. Soc.Lin.Par. vi. 213. 



NETJEOPLATTCEEOS. PluTcenet: Fte; ALOICOENIUM, Gaudichaud; SCTJTI- 



GEBA,.Fee; PLiTYCEBIA, JFVfi ; ACBOSTICHI 8p., Auct. 



Sori superficial, non-indusiate; the receptacles, (a series of 

 crowded anastomosing veins) occupying the under surface of 

 separate lobes or large amorphous portions of the fertile fronds. 

 Veins furcate, free or here and there anastomosing; venules anas- 

 tomosing in large trapezoid or sub-hexagonal elongated areoles ; 

 the veinlets free, divaricate or hamate, within the areoles. 



Fronds heteromorphous, coriaceous, laciniate or lobate, 

 clothed with stellate hairs ; the fertile ones articulate. Ehizome 

 sub-globose. A very distinct group. The primary veins rarely 

 unite, while the secondary ones are compoundly anastomosed. 



Ex. : P. alcicorne, Denv. I P. Stemmaria, Hem. 



P. biforme, Bl. \ P. grande, J. 8m. 



(b) Sori in quadrate patches. 



16. DRYOSTACHYTJM, J. Smith, Hook. Journ. Sot. 

 iii. 399. 



Sori superficial, non-indusiate, oblong or quadrangular, ap- 



