8. HYMENOPHYLLUM. § 1. EUHYMENOPHYLLUM. 91 



base truncate, lower cuneate. Pinnulae crowded, rhomboid-oblong, cut 

 down into simple or 2-fid, cuneate segments, the ultimate lobes obtuse 

 or somewhat emarginate at the apes. Texture elastic; rachises and 

 surfaces naked; colour yellowish-green; veins 1 in each ultimate lobe, 

 fuscous. Sori confined to the upper part of the frond, placed on much 

 abbreviated lobes; indusium 2-valved quite to the base; valves round or 

 somewhat dilated, entire or slightly wavy, nearly 1% mm. broad. 

 Neio Guinea. 



(18) H. .Iiinglinliuii, r. j». n. 



Forma typica: Wings of the principal rachises flat. 



Forma crispato-alata : Wings of the principal rachises crisped. 



Also in Luzon, Mindanao, Negros. 



(18a) See No. 14. 



(18&) II. imnfotactum, ». A. ». «., in Bull. Btz., 1912, VII, 20. 



Like H Blumeanum Spr but the fronds larger, + 15 — 20 cm. long, 

 + 5 — 20 cm. broad, the narrowest form lanceolate, mostly broadest at 

 the middle, the broadest form deltoid, broadest at the base, the pinnae 

 erecto-patent to horizontal; sori occupying the higher regions of all the 

 pinnae in the fully developed plants, the indusia deeply 2-valved, the 

 valves oblong, ovate or obovate, narrowed, rounded or truncate and 

 generally irregularly crenate or emarginate at the apex; receptacle linear, 

 not exserted. 



Java. 



(18c) H. longifoliuiu, ». A. ». Jt., in Bull. Btz., 1914, XVI, 17. 



Rhizome creeping, slender, wiry, sparingly long-hairy. Stipes scattered, 

 + 3 — 4 cm. long, naked, winged at least in the upper half. Fronds 

 broadly linear, + 40 — 50 cm. long, ± 8 — 9 cm. broad, narrowed at the 

 base, the rachis broadly winged. Pinnae numerous, close, spreading, 

 arcuate-ascending, triangular-lanceolate, the largest to + 5 cm. long, to 

 + 2 '/.J cm. broad at the obliquely truncate-cuneate base, the rachis 

 broadly winged. Segments to + 7 on a side below the somewhat 

 elongated terminal one, the higher simple or forked, the lowest anterior 

 the largest, triangular-oblong, to 1 'j.^ cm. long, to 1 cm. broad, the base 

 1 - 2-pinnatifld on the posterior side, 2 — 4-pinnatifld on the anterior side. 



