8 Ferns of British India and Ceylon. 



again pinnatifid ; sori 2-12 to a pinna terminal or axillary on the 

 segments on both sides, divided about half-way down ; valves 

 rounded entire, clusters often exserted." Hook. Syn. Fil. p. 62. 

 H. formosum Bracken. H. Junghuhnii and eximium, V. D. B. 



Perak. {Day. King.) The fern referred by me to rarum 

 R. Br. in my list of Mr. Day's Perak ferns is only a small form 

 of this species. 



(Also in New Zealand, Java, Tahiti, Samoa, Aneiteum, Fiji, 

 and other Polynesian Islands.) 



9 a. Hymenophyllum flaccidum. {Van den Bosch.) {H, 

 denticulatum var. |3 flaccidum, BeddSs Handbook, p. 35.) Thif 

 is a good species. 



Id. Hymenophyllum Neesii. Perak, 5,000 feet alt. 



12. Hymenophyllum aculeatum. V.D.B. "Stipe 1-2 in. long, 

 naked or slightly winged ; frond broadly ovate, triangular, deeply 

 tripinnatifid, 1-2 inches long, more than 1 inch broad below ; rachis 

 margined throughout with a wing which is thickly beset with 

 aristate teeth ; pinnae crisped, the lower ones flabellate-pinnatifid 

 nearly down to the midrib ; the ultimate segments very narrow, 

 2-3 lines long, and deeply cut up nearly to the midrib by 

 numerous strong aristate teeth ; sori solitary supra-axillary 

 spinose on the back, divided about half-way down with ovate 

 spinoso-serrated valves." Van den Bosch, Hymenophyllacece 

 Javanicce pi. xxxi. ; sabincefolium, Baker, Syn. Fil. p. 71. 



The leafy portion is hardly more than bristly teeth, imparting 

 to it a resemblance to Lycopodium cernuum. 



Perak, 4,000 feet alt. Penang, 3,000 feet alt. {Day, King.) 



(Also in Java.) 



ia. Trichomanes Wallil {Thwaites.) Rhizome filiform, wide- 

 creeping ; fronds ovate-orbicular, ciliated entire, |— ^ inch long ; 

 veins distinct, simple, spurious venules none ; sorus solitary at 



