Vl. POLYPODlACEAE. § 3. DAVALLIEAE. 127 



h.h. Sori dorsal or terminal, solitary on the veins or vein- 

 lets, sometimes confluent in pairs. 

 «;. Sori dorsal, or terminal on very short, rather 

 inconspicuous lateral veinlets. 



X. Indusium attached at the base, often cucul- 

 late, at length reflexed. 



No. 27. Cystopteris. 

 x.x. Indusium attached at the base and sides, 

 half-cupshaped, never reflexed. 



(No. 55. Asplenittm, § Loxoscaphe)_ 



c.c- Sori always terminal on the veins or rather 

 long veinlets. 



<l. So»i placed in conspicuously cucullate mar- 

 ginal outgrowths, which are closed by the 

 + flattened, transversally obloug indusia. 

 No. 31a. Saecoloniu {sorbifolium). 

 d,d. Sori not as in d. 



e. Rhizome erect. Stipes tufted. 



+, Indusium cuneate, open at the outer 

 edge. {moluccanum). 



No. 31a. Saccoloiua 

 -1-. + • Indusium roundish, attached by a 

 broad base, otherwise free. 



No. 33. jlcrophorns. 

 e.e. Rhizome creeping. Stipes remote or ap- 

 proximate. 



f. Segments rhombuidal or linear-tri- 

 angular, unequal-sided at the base. 

 Receptacle distinct. 



No. 55. ilierol ejpia^ 



f.f. Segments oblong or liijear, not or 

 hardly unequal-sided at the base. 

 Receptacle indistinct. 



No. 36. Tapeinifliiim. 



