2S8 27. CYSTOPTERIS. 



Rhizome short, oblique, clothed like the young fronds with large, mem- 

 branaceous, ferrugineous, ovate-lanceolate, acuminate scales. Stipes stramineous, 

 to 45 c.M. long, scaly at the base, purveyed like the rachis with articulated 

 hairs and minute tubercles. Fronds to 45 c.M. long, ovate-lanceolate. Pinnae 

 subsessile, subopposite, spreading, subdivaricating, 15 — 30 c.M. long, oblong- 

 lanceolate, the lower ones distant. Pinnulae numerous, approximate, spread- 

 ing, 5 — 8 c.M. long, 15 — 25 m.M. broad, oblong-lanceolate. Tertiary divisions 

 oblong, obtuse, the lower ones sessile, pinnatifid, the higher ones adnale, 

 shortly toothed or crenale. Texture membranaceous, flaccid or firm; costae 

 and veins sparingly hairy; under surface glandular; veins fine. In(fusium 

 transversely oblong or semiorbicular, with the margin fimbriato-glandular, at 

 length reflexed. 



Java. 



38. Or>OIS^TOSOI«.L^, J>re«I. 



Sori roundish or transversally oblong, terminal or subterminal on the 

 ultimate segments of compoundly divided fronds, solitary on the vein tips or 

 uniting the tips of + 2 — 5 veins. Indusium of the same shape, attached at 

 the inner side of the sorus, opening outwardly. 



Rhizome short. Stipes not articulate to the rhizome. Fronds compound ; 

 ultimate segments more or less narrowly cuneate, the apex + truncate. Diels, 

 in Engl. & Prantl, N&t. Pfl.Fam., I*, fig. 116, D. 



Pantropical. 



Arrangement of the sections. 



§ 1. EU-ODONTOSORIA. Fronds small or middle-sized, erect, not climbing. 

 §2. STENOLOMA. Fronds long, climbing. (Not in Malaya). 



§ 1. EU-ODONTOSORIA. 



$. Sori solitary on the vein lips, i — J2 to a lobe. 



j)c. Loiver pinnae not caudate at the apex. (1) 0. chinensis. 



)|<.5tc. Lower pinnae caudate at the apex. (2) 0. biflora. 



$.§. Sori uniting the apices of 2 or more veins or veinlets, occupying the whole 



breadth of the bbes. (3) 0. retusa. 



