8. HYMENOPHYLLUM. § 2. LEPTOCIONIUM. 99 



» Plants received from the Philippines, determined as H. serrulatum, 

 have the main rachis more or less narrowly winged throughout, the 

 rachises and veins hirsute with pale-ferrugineous hairs, the pinnae 

 lanceolate to ovate, the higher with a single axillary sorus, the indusia 

 distinctly crested and deciduously hairy at the base, with the valves 

 partly suhtriangular partly rounded. 



37 H. BSeinnsirdtii. r. jf. n. 



Also in Borneo, New Guinea. 



(3,1 a U. Copelantliaiitsui, v. A. ». JR., in Bull. Btz., 1912, 

 VII, 19; il. australe, Cojjel. (not Willcl} in Leafl, III, 800. 



Rhizome creeping, branched, naked. Stipes + 4—6 cm. long, 

 winged, nudate at the base, the wing very conspicuously crisped. Fronds 

 ± 6 — 10 cm. long, 4-5 cm. broad, flrm-membranaceous, ovate-oblong, 

 narrowed at the apex, .3-pinnatifid or sub-4-pinnatifid, fertile in the upper 

 half, the wing of the main rachis very conspicuously crisped. Pinnae 

 several, subcontiguous, partly erecto-patent partly spreading, cut down 

 to a very conspicuously crisped wing into several similarly crisped 

 pinnulae. Pinnulae pinnatifld, with the segments simple or forked. 

 Ultimate segments narrow, + ' , mm. broad. Margins of the lobes and 

 wings sparingly but positively, though shortly, toothed. Sori terminal 

 on the lobes; indusium I — 1 '/.^ mm. broad, deeply 2-valved; valves 

 suborbicular, entire or minutely and irregularly repando-denticulate ; 

 receptacle stipitate-capitate (when ripe'. — H. Rein ward til V. T). B. 

 differs from this in having the margins less conspicuously crisped, more 

 copiously denticulate and the receptacle thick, elongate-clavate. 



Mindcijnao. 



(.38a) II. hisntarckiaiiiiiti, Christ, in Schum. & Laut., Flor. 

 deut. Sch.geb., Suppl., 34; ? H. thuidium, ifarr., C. Chr., Ind Fil., Suppl.). 



Rhizome wide-creeping, naked. Stipes scattered, to ± 10 cm. or 

 more long, naked, upper half winged, as are the rachises, the wings 

 crisped, irregularly serrate-dentate. Fronds roundish-ovate, more than 10 

 cm. long when fully developed, 4-pinnate in the lower part. Ultimate 

 segments ± '/^ — 1 mm. broad, more or less crisped, serrate. Texture 

 thin; surfaces naked. Sori terminal on the ultimate, segments, small. 



