72 Ferns of British India and Ceylon. 



pair nearly as long as the central ones, gradually decreasing in size 

 towards the apex, pinnules pinnatifid to nearly the rachis, but always 

 more or less connected by a decurrent wing, very membranaceous 

 and flaccid, and furnished on both sides sparsely (as is the rachis and 

 costa) with long weak pellucid jointed setae; segments of the pinnules 

 generally as broad at the apex as at the base, more or less pinnatifid, 

 with the lobes obtusely rounded or variously toothed ; veins forked 

 and simple reaching the margin ; sori one to each segment, medial on 

 the lower vein ; involucre very membranaceous, small scale-like, ovate, 

 roundish ovate, or oblong, from a broad base fornicate, not nearly 

 covering the sorus, fimbriate or entire, fugacious. Bedd. F. B. I. t. 

 312 ; also t. 262, under Lastrea. 



Moulmein Mountains ; Sikkim 5,000-8000 feet. 



TRIBE V.— LINDSAYE^. 



Sori placed in a line, at or very near the edge of the frond, 

 covered with an involucre, the inner valve of which is membra- 

 naceous, the outer formed of the margin of the frond. 



GENUS XXI.— LINDSAYA. (Dryand.) 



(In honour of Dr. Lindsay, a writer on Ferns.) 



Sori marginal or submarginal, placed to the apex of, and uniting 

 two or more veins ; involucre double, opening outwardly, the inner 

 valve membranaceous, the outer formed of the more or less changed 

 margin of the frond j veins free ; pinnae unilateral or equilateral. 

 § Pinnce. unilateral. 



1. Lindsaya cultrata. (Swartz.) Rhizome wiry, creeping, 

 furnished with linear scales, stipes wiry flexuous, 3-6 inches long ; 

 fronds 6-12 inches long, about 1 inch broad, simply pinnate, pinnae 

 unequal-sided, lower edge nearly straight near the main nerve ; upper 

 edge slightly lobed or nearly entire ; lower pinnae stalked ; texture 

 rather coriaceous. Swartz. Syn. Fil. 119. Hook. Syn. Fil. 105. 

 Bedd. F. S. I. t. 23. Lindsaya Lobbiana (Hook.), Bedd. F B. I. 

 i. 28. A variety with rounded pinnae, and a 4-winged rachis. 



