﻿8. HYMENOPHYLLUM. § 1. EUHYMENOPHYLLUM. 71 



+ 3 c.M. long, I'-j — 2 c M. broad, cut down to a winged rachis into 4 — 7 

 segments on each side, the base narrowed and decurrent. Segments ovate, 

 obtuse, dee[dy incised. Lobes linear, obtuse, entire, 2 — 4 on each side, + 



1 m.M. broad. Texture firm; colour dark-brown; both surfaces nearly naked. 

 Sori solitary on the superior primary segments, exserted, often sliorl-stalked; 

 indusium campanulate, deeply 2-valved; valves triangular, entire, acute, at 

 length reflexed; receptacle 3 m.M. long, broad, exserted. 



Celebes. 



(12) H. tbuidiuiii, Marr., Journ. of Linn. Soc, Bot., XVI, 2S. 



Stipes slender, ^'/^ — 7 '/a ^.M. long, winged. Fronds 6 — iVj^ c.M. long, 



2 72— S cM. broad, ovate to oblong, 3 — 4-pinnate, erect; rachis and branches 

 winged like the stipe. Pinnae to ± 2'/2 c.M. long, deltoid; wings and 

 ultimate divisions linely crisped throughout. Surfaces naked. Sori few to 

 many in the upper part of the frond, on the ends of the ultimate divisions, 

 large; indusium divided nearly to the base; valves large, ovate, crisped. 



Philippines. 



* (13) H. isalakense, JSac, Flor. Btz., I, 18. 



Rhizome wide-creeping, slender, sparingly pilose. Stipes distant, 4 — 8 

 c.M. long, winged throughout or nearly so. Fronds lanceolate or obovate, 

 5 — lo c.M. long, 3 — 10 cJL broad, sometimes subdeltoid; main rachis broadly 

 winged. Pinnae erecto-patent, cut down to a broadly winged rachis into 

 simple, forked or 2 X forked pinnulae. Ultimate segments 3 — 1 5 m.M. long, 

 2 — 3 m.M. broad, linear or oblong, bluntly rounded or emarginate at the apex. 

 Surfaces naked : a single central rib in each segment. Sori terminal on the 

 segments; indusium deeply 2-valved; valves roundish or transversely oblong, 

 entire, broader than the segments, to 3^2 na.M. broad; receptacle malleiform. 



Java. 



* (14) H. Bluiueanum, Spr., Rac, Flor Btz., I, 16; V. D. B., 



Hymen. Jav., tab. XXXVI; Bedd., Ferns S.I., tab. CCLXVI; H. pycnocarpum 

 ^- integrum, V. D. B., 1. c, tab. XXXVII— XXXVIII; H. polyanthos, Sw., Hk. 

 Bk., Syn Fil., 60, p. p. 



Rhizome filiform, creeping. Stipes slender, 1 — 4 c.M. long, not rarely mar- 

 ginate, not winged, or winged in the upper half only. Fronds obovate to lanceolate 

 or even linear, 5—18 c.M. long, + 1 — 7 c.M. broad; main rachis narrowly 

 winged. Central pinnae the longest, oblong or lanceolate, deltoid or rhom- 



