﻿678 . 



'T'2. CYCLOPHOItXJS, Besraua;. 



Sori round, rarely oblong, and then oblique or sometimes subparallel to 

 the costa. No indusium. 



Rhizome creeping. Stipes articulate to the rhizome. Fronds simple, ± 

 entire in malayan material ; surfaces covered with scattered or more or less 

 densely crowded or interlaced stellate hairs, which are fastened by a central 

 point, those of the upper surface often caducous; veins anastomosing, hidden; 

 areolae with free included veinlets. Sori sometimes quite hidden among 

 the tomentum. Hk. Bk., Syn. Fil., tab. V, fig. 48, k— 1; Diels, in Engl. & 

 Prantl, Nat. Pfl. Fam., P, fig. 168. {Nipliobolus). 



Arrangemenl of the sections. 



§1. NIPHOBOLUS. Venation as in (^ampyioneuron, i. e. areolae + regularly 

 subquadrangular, with 2 or more included, excurrent, simple or forked 

 free veinlets. Diels, 1. c, fig. 165, H. 



§2. NIPHOPSIS. Venation as in Pleopeltis, i. e. areolae + irregular, the 

 free veinlets spreading in various directions. Diels, 1. c, fig. 164, B— E. 



§ 1. NIPHOBOLUS. 



Tomentum adpressed, often very thin. 



b. Fronds dimorphous, the fertile ones mostly narrower and often longer 

 than the barren. 



•{•. Fertile region of the frond with the tomentum as thin as in the 

 barren part. 



%. Rhizome scales black. Stellate hairs of the under surface scat- 

 tered. (1) C. pachydermus; 

 i(^.:)f^. Rhizome scales ferrugineous. Stellate hairs of the under sur- 

 face crowded. (2j C. rupestris. 

 •}•.•{•. Fertile region of the frond with the tomentum thicker and looser 

 than in the barren part. 

 X. Rhizome scales adpressed. Fertile fiends to i c.M. broad. 



(3) C. adnascens. 

 X'X. Rhizome scales spreading at the point. Fertile fronds i^l^ — 

 2 c.M. broad. (4) C. varius. 



b,h. Fronds uniform or nearly so. 



