288 



FEENS : BEITISH AND FOREIGN. 



snbauriculate on the upper margin. 8ori uniserial, 

 antimarginal. Indusium snborbicular. — Borneo. 



Obs. — The affinity of this species is with N. tuberosa ; but 

 seeing the two plants together, the dififerenoe is readily seen. 



79a. ISOLOMA, J. 8m. 



Vernation fasciculate, erect, stoloniferous. Fronds linear, 

 1-2 feet long, pinnate ; pinuEB oblong, elliptical or lanceolate, 

 falcate, coriaceous, the base truncate and subauriculated ; 

 petiole short, articulated with the rachis. Veims forked ; sterile 



Genus 79a.— Portion of sterile firond and a fertile pinna, natural a.- 

 ditto enlarged. No. 1. 



venules feee, the fertile transversely combined at the margin, 

 forming a continuous receptacle. Indimwm linear, interiorly' 

 attached, plane, equal with and conniving with the margin, 

 forming with it a vertical exteriorly open groove, containing 

 the sporangia. 



1. I, lanuginosa, /. 8m. in Land. Joum. Bot. 1, p. 420. 

 Lindsaea lanuginosa, Wall.; HooJc. Sp.Fil.l,t.69 B. 

 — Singapore, Penang, New Guinea, and Seychelles 

 Islands, 



