TTtii . &ENEBA. or EEEKS: 



14. PHOTIIfOPTEEIS, J. Smiih, SooJc. Jottm. Bot. 

 iii. 403; It. 155. 



Son superficial, non-indusiate ; the receptacles occupying the 

 under surface of the contracted upper pinnae. Veins pinnate 

 from a central costa, prominent; venules transversely anasto- 

 mosing, forming nearly equal parallelograms; vemlets 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 ; pinnce articulate, auriculffiform on the lower side at the 

 base. Bhizome scandent.— A very well-marked genus, remark- 

 able on account of the peculiar base of the pinnee. 



Ex. : P. Horsaeldii, J. Sm. I P. speeiosa, SI. : Pr. 



§ 2. Plattceeire. 

 (a) Sori in amorphous <paiches. 



15. PLATYCBBITTM, I)es:i>(mx,Aim. Soc.Lin.Par. vi. 213. 



Netteoplattcbbob. PJiiiteTirf; Me; Aicicoehitm, Gaudichaud; SoOTl- 

 GESA, Pee; Plattceeia, JVe ; Aceostichi sp., ^ttci. 



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. Rhizome 



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



unite, while the secondary ones are compoundly anastomosed. 



Ex. ; P. alcicome, X>esv, 1 P. Stemmaria, Desv. 



P. bifonne, M. \ P. grande, J. Sm. 



(b) Sori in quadrate patches. 



16. DRYOSTACHYTJM, J. Smith, Mook. Jou/rn. Sot. 

 iii. 399. 



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



