220 22. DRYOPTERIS. § 2. XEPHROIiIUM. 



* (91) D. callosa, C. Chr., Ind. Fil. ; Nephrodiiim 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 ± V4~'V3"^^y down to the costa. Lobes 5—5 m.M. long, to 5 m.M. 

 broad, falcate, entire, crenale or toothed. Texture coriaceous ; surface,s naked^ 

 not rarely minutely verruculose; rachis hairy above, provided oiT 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 + ^Jt-yfB-Y down to the 

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

 side, the 5 lower ones anastomosing. Sori confluent. 



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



(92) D. laevis, C. Chf., 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, 13 — 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; costae thinly pubescent; veins 

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



Luzon. 



(93) D. bracbyotlus, O.Htsie, C. Chr., Ind. Fil.; Nephrodium bror 

 chyodon, Hk., Hk. Bk., Syn. Fil., 295; Aspidium brachyodus, Ch-is., Christ, 

 Farnkr. d. Erde, 248. See the Appendix. 



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

 Fronds 60—90 c.M. long, 50—45 c.M. broad. Pinnae o'/j— 4 c.M. broad, 

 cut from .% — '/a t^^ 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 



