HymenophylliMn\ i. — filices. 35 



Fronds tall, 3-pmnatifid. Sori ter- 

 minal or axillary, half-sunk in 

 the frond ; invol. opening half- 

 way down 11. H. dilatatum. 



Fronds tall, broad, 3- or 4-pinnati- 

 fid. Sori terminal or axillary, 

 free ; invol. orbicular, divided 

 nearly to the base 12. H. pulcherrimum. 



** Fronds pinnate below. Stipes not winged. Rachis winged above only. 



Stipes and rachis glabrous. Fronds 



bright-green. Invol. ovate ... 13. H. demissum. 



Stipes and rachis bristly. Fronds 



dark-green. Invol. orbicular .. . 14. H. scabrum. 



Stipes woolly at the base only ; rachis 

 glabrous. Fronds pale-green, 

 glistening 15. H. fiabellatum. 



Stipes, rachis and costse sparingly 

 hairy. Invol. small, terminal, 

 half-sunk in the frond ; hairy 

 when young 16. H. rufescens. 



III. — Fronds ciliated, and covered with brownish stellate 

 pubescence. 



Fronds oblong, acuminate, with a 

 broad central undivided portion ; 

 rachis broadly winged above and 

 ciliated. Sori terminal, sunk in 

 the frond 17. H. cUiatum. 



Fronds pendulous, ovate-lanceolate, 

 divided nearly to the rachis ; 

 rachis slightly winged above. 

 Sori terminal, sunk in the frond 18. H. subtilissimum. 



Fronds rigid, erect, linear-oblong, 

 everywhere covered with dense 

 pale tomentum ; rachis quite 

 free. Sori terminating the seg- 

 ments; lips of invol. shaggy ... 19. H. malingii. 



1. H. tunbridgense, Smith. 



Quite glabrous, tufted or matted. Rhizome slender, wiry. Fronds 

 1-3 in. long, oblong-lanceolate or linear, pinnate ; pinnae pinnatifid ; 

 segments linear, toothed. Involucre usually solitary, axillary, sub- 

 orbicular, compressed, free or sunk in the segments ; lips toothed or 

 entire — 



