98 8. HYMENOPHYLLUM. § 2. LEPTOCIONIUM. 



side; indusium with the base acutely obconical and not rarely provided 

 with a few hardly elevated, longitudinal crest-like ridges. 

 Also in Sumatra^ Mindanao, Negros. 



(31a) H. ovsatuaBB, CopeL, in Philipp. Journ., VI° 70. 



Rhizome filiform, giabrescent. Stipes ± 1 cm. long. Fronds ovate, 

 ± 4 cm. long and 3 cm. broad, obtuse, the rachis blackish, winged 

 towards the apex. Pinnae + 9 on a side, approximate to imbricate, 

 sessile, rounded at the apex, the edge cut down nearly to the costa, the 

 segments 1^2-lobed (1 — 2 times lobed?), approximate, the ultimate lobes 

 ± '74 I'^i^- broad, obtuse, not crisped, sparingly serrated at the edge. 

 Texture coriaceous ; surfaces naked ; colour brown. Indusium 2-valved more 

 than 'j.yW&y down, the valves broadly ovate, toothed in the upper part. 



New Guinea. 



(816) M. perparvnluBBi, w. A. ». Mi., in Bull. Btz., 19l4,XYl, 18. 



Rhizome filiform, brown-hairy, rather giabrescent. Stipes scattered, 

 filiform, to 5 mm. or sometimes to 1 cm. long, naked or sparingly hairy, 

 as are the rachis, costae and costulae. Fronds ovate or oblong, ■''/^ — 1 ' j 

 cm. long, 3 — 7 mm. broad, the rachis winged in the upper part. Pinnae 

 close, 3 — 5 on a side, spreading to erecto-patent, the smallest simple or 

 forked, the largest forked or sparingly pinnatifid on the anterior side, 

 the segments simple or forked; lobules ± 1 mm. broad, irregularly 

 spinuloso-denticulate. Texture thin; surfaces naked; a central vein in 

 each ultimate segment. Sori few, axillary, on the higher pinnae; 

 indusium 2-valved %-waj down, the base obconical, the valves when 

 young rather narrowly oblong, when adult rather semiorbicular, with the 

 edge spinuloso-denticulate. 



Sumatra. 



(34) H. iiiul(ifi(liiaB«, Stv.; — var. novoguineense, Rst., in Fed., 

 Rep., XII, 166. 



Witf. MMVo^'iiiHCCMSO: Differs from the type in having the 

 stipes stouter, punctato-rugulose, margined nearly quite to the base. — 

 New Guinea. 



(35) H. serrulaltiiu. c. CUf. 



Indusium obconical at the base, the valves subtriangular, bluntish at 

 the apex (conf. Hooker's plate). 



