﻿220 22. DRYOPTERIS. § 2. NEPHROniUM. 



* (91) D. calloiia, C. criir., Ind. Pil.; Nephrodiam callosum, Keys., 

 Rac, Flor. Btz., I, 192; — var. sumatrana. 



Rhizome erect, to 10 c.M. long, mucous at the apex. Stipes naked, glossy, 

 to 100 c.M. long, provided with large, distant glands sometimes 1 c.M. long 

 and subulate. Fronds lanceolate, acuminate, 100 — 200 c M. long, 40— 80 c.M. 

 broad. Pinnae linear, sessile, to 2 c.M. broad, the base ± truncate, the edge 

 cut ± '/^ — Vs'Way down to the costa. Lobes 3—5 m.M. long, to 3 m.JVI. 

 broad, falcate, entire, crenale or toothed. Texture coriaceous ; surfaces naked, 

 not rarely minutely verruculose; rachis hairy above, provided on the under 

 side (at the bases of the pinnae) with glands similar to those of the stipe; 

 veins pale-coloured, 8 — 14 on each side of the main veins, the 5 — 6 lower 

 anastomosing. Sori close, 8 — 13 an a side, divaricating from the apices of 

 the lobes towards the costa. 



War. (Sumatrana : Fronds small, ± 20 — 2S c.M. long, ± 5—7 

 c.M. broad, on stipes to 15 c.M. long. Pinnae cut ± ^|^-yv3iy down to the 

 costa, the lower ones gradually dwarfed ; veins not pale-coloured, 6 — 8 on each 

 side, the 3 lower ones anastomosing. Sori confluent. 



Java, Sumatra; — var. sumatrana: Sumatra (Burck). 



(92) D. laeviiS, C. Chr., Ind. Fil. ; Aspidium laeve, Kze, Mett., Farng. 

 IV, Phegop. & Aspid., 104. 



Stipes stramineous, naked. Fronds + 90 c.M. long, ovate, the base 

 abruptly narrowed, pinnate. Pinnae ± 22 c.M. long, 15 — 18 m.M. broad, 

 sessile, linear, pinnatifid caudato-acuminate, the base truncate, the apex 

 serrate; lower pinnae shorter, the lowest ± 10 c.M. long, oblong, remote. 

 Lobes ovate, acute, repando-denticulate, those on the upper base the largest. 

 Texture subcoriaceous ; surfaces glossy, scabrous: coslae thinly pubescent; veins 

 ± 7 on each side, the 1 — 2 lowest anastomosing. Sori medial ; indusium naked. 



Luzon. 



(93) D. brachyodus, O.Ktxe, C. Chr., Ind. Fil.; Nephrodium hra- 

 chyodon, Hk., Hk. Bk., Syn. Fil., 295 ; Aspidium brachyodus, Ghis., Christ, 

 Farnkr. d. Erde, 248. 



Rhizome ± erect. Stipes tufted, 50 — 60 c,M. long, greyish, naked. 

 Fronds 60—90 c.M. long, 30—45 c.M. broad. .Pinnae o%—i c.iM. broad, 

 cut from 7.3 — V2 the way down into blunt, oblong, slightly falcate lobes; 

 lower pinnae not much smaller than the others. Texture coriaceous; rachis 

 and both surfaces ± naked; costae and costulae slightly hairy; main veins 



