149 



(ii) No auricles below, 5-8 pair of 

 veins anastomose, except in 

 fertile contracted frond. 



6. N. pennigerum. 



(iii} Stipes covered with hair-like 

 scales, a pair of veins anasto- 

 mose. Sori on the back of the 

 veins. 



7. N. crinipes. 



(iv) Lobes generally square at apex, 

 2-4 pair of veins anastomose. 

 Lower pinnae reduced though 

 not to mere auricles. 



8. .V. truncatum. 



i. Nephr odium subpectinatum Wall. 



Rhizome creeping. Stipes scaly below. 

 Fronds 12-15 inches long, pinnate; pinn* 

 truncate at the base, long tapering at the apex, 

 with shallow serrated lobes, lower pinnae not 

 reduced. Rachis and surfaces naked. Tex- 

 ture herbaceous. Veinlets pinnate in each lobe, 

 6-8 on each side, the lowest pair anastomos- 

 ing at an angle with an ex-current veinlet which 



