76 8. HTMENOPHTLLHM. § 2. LEPTOCIONIDM. 



g'.g'. Indusium divided ^j^-way down, the lips nar- 

 rowed at te apex. (35) H. serrulatum. 

 b.b. Edges crisped, rarely flattened in No. 41. 

 ±. Indusium quite naked on the hack. 



S. Fronds under 8 c.M long; valves of the indusium elliptical. 



(36) H. fraternum. 

 9.S. Fronds more than 8 c.M. long; valves of the indusium + 

 orbicular. 

 3. Edges bluntly dentate, the teeth not deep. 



(37) H. Reinwardtii. 

 S.3. Edges aculeate-dentate, the teeth deep. 



(58j H. physocarpum. 

 ±.±. Indusium spinulose on the back throughout. '^ 



;+;. Edges of the segments deeply toothed nearly to the midribs. 



(39) H. sabinifolium. 

 *.*. Edges not deeply toothed. (40) H. Neesii. 



J.1.1. Indusium provided with irregularly spinoso-fimbriate appendages 

 on the back at the base. 

 S'. Valves of the indusium serrate or dentate. 



3f. Fronds 5 — 8 c.M. long. Indusium divided + ^ji-way 



dowHj valves retuso-denticulate. (41) H. denticulatum. 



3.3'. Fronds 2% — 5 c.M. long. Indusium divided ± ^j^-way 



down, valves sharply toothed. (42) H. aculeatum. 



2'.2'. Valves of the indmium en tire. (45 ) H. bis marck i anum . 



±.±.±.±. Indusium provided with rather close, longitudinal crests on the 



back at the base. (44) H. brachyglossum. 



(25) H. subflabellatam, Ce»., Fel. di Bor., 8. 



Rhizome creeping, branched, hairy. Stipes slender, 5—10 m.M. long, 

 not winged. Fronds 5 — 10 m.M. long, 3-partite, nearly flabellate. Primary 

 segments + pinnatifid. Lobes linear, obtuse, distant, spinuloso-denticulate. 

 Sori terminal on the lobes; indusium ovate, with the edges of the valves 

 spinuloso-ciliate; receptacle exserted. 



Borneo. 



(26) H. ednlentum, C. Chr., Ind. Fil.; Leptocionium edtdentum, 

 V. D. B., Ned. Kruidk. Arch., V, 148. See Supplement 1. 



