174 Ferns of British India and Ceylon. 



Var. 7. sphceropteroides. (Clarke!) Involucre small, early 

 disappearing ; sori both lateral and terminal on the veins, becoming 

 soon globose, often appearing elevated from the frond. Clarke, 

 F. N. I. t. 62, fig. 1. Asplenium Atkinsoni, var. Andersoni, 

 Clarke, F. N."l. t. 57. 



Throughout the Himalayas, 9,000-13,000 feet. 



GENUS XLIL— DIPLAZIUM. (Swartz.) 



(Diplazo to be double ; the double indusia or involucres.) 



As in Asplenium, but some of the sori double, i.e., on each side 

 of the vein, each furnished with a linear indusium, the one opening 

 interiorly, the other exteriorly. 



r. Diplazium lanceum. (Thunb.) Caudex long-repent, 

 rooting sparingly, scaly, stipes distant 4 inches to a span long 

 slender, thickened at the base, and paleaceous with black scales, 

 fronds chartaceous, firm, opaque, longer than the stipes, rarely an 

 inch wide, lanceolate, attenuated, and acuminated at each extremity, 

 entire, sometimes a little repand ; costa slender, prominent beneath ; 

 veins horizontal, fascicled, the superior, and sometimes the inferior, 

 branch only fertile; sori linear, distant, remote from the costa, often 

 diplazioid. Thunb. Fl. Jap. 333. Hook. Sp. Fil. iii. 235. Bedd. 

 F. S. I. t. 227. 



Ceylon, Matale East and Saffragram 2,000-3,000 feet, dies off 

 in dry weather. Assam and N. E. Bengal 500-5,000 feet, extending 

 to Chittagong and East Nepal. 



(Also in China, Formosa, and Japan.) 



2. Diplazium subserratum. (Fl.) Caudex creeping, elon- 

 gated; fronds membranaceous, i| feet long, i-i| inch wide, 

 glabrous and satiny, elongate-oblong, lanceolate, sharply acuminate, 

 moderately attenuated below, obtuse or acute at the base, towards 

 the middle sinuate-crenate, coarsely dentate-serrated nearer the 

 apex ; costa slender, firm, prominent beneath ; veins fascicled, 



