82 



Ferns of British India and Ceylon. 



TRIBE VI.— PTERIDEiE. 



Sori marginal, oblong, or linear ; indusium of the same shape 

 as the sorus, formed of a more or less changed and reflexed portion 

 of the frond, opening inwardly. 



GENUS XXIII.— ADIANTUM. 



(Adiantos, dry; water will not lie on the fronds.) 



Sori marginal, varying in shape from globose to linear, usually 

 numerous and distinct, sometimes confluent and continuous ; indu- 

 sium of the same shape as the sorus, formed of the reflexed margin 

 of the fronds, bearing the capsules on its under side ; veins free. 



Adiantum Parishii. (Hook.) Small, csespitose ; no distinct 



caudex; roots few, 

 fibrous, tomentose ; 

 fronds about i inch 

 each way, orbicular, 

 flabellate, membra- 

 neous, pellucid, ste- 

 ] ile ones crenate- 

 dentate, fertile ones 

 few (3-5) lobate; 

 sinuses deepsorifer- 

 ous ; veins origi- 

 nating from the 

 base, flabellately- di- 

 vergent, repeatedly dichotomous ; stipes slender, filiform, ebeneous, 

 black, shining, articulated at the summit. Hook. Sj>. Fil. ii. 237, and 

 Fil. Exot. i. pi. 51 ; Syn. Fil. p. 114. Beid. F. B. I. t. 16. 

 Moulmein, on limestone rocks. 



2. Adiantum lunulatum. (Burm.) Stipes 4-6 inches long, 

 tufted, wiry, naked, polished dark chestnut-brown; fronds 6-12 



J / rv'?4 2. 



ADIANTUM PARISHII. 



{Hook. 



