678 



^2. OYCX.OI'HOItXJS, neavnwc. 



• 



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 stellale hairs, which are fastened by a central 

 point, those of Ihe 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. & 

 Prautl, Nat. Pfl. Fam., I*, fig. 168. {Niphobolus). 



Arrangement of thb sections. 



§1. NIPHOBOLUS. Venation as in Campyloneuron, 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. /. ,- , y- . 



f . 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- 

 'ererf- (1) C. pachydermus. 



*.*.i?A»5ome scales ferrugineous. Stellate hairs of the under sur- 

 face crowded. (2j c. rupestris. 

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

 than in the barren -part. /■.,- 

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



(3) C. adnascens. 

 x.x. Rhizome scales spreading at the point. Fertile fronds f '/, — 

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



b.h. Fronds uniform or nearly so. 



