GENEBA OP KEENS: 



[c] Eeceptacles local, &c., continued. 



(1) Sori transverse to the veins, &c., continued. 



(b) Eeceptacles marginal or sub-marginal, 



(rarely medial) always remote from the 

 midrib, usually linear; sometimes ob- 

 long or punctiform. 



(a) Sori non-indusiate, (mostly occupying 

 a groove or furrow, sometimes super- 

 ficial), linear 



(a) sub-marginal (often seated in a shal- 

 low dorsal furrow) 



(/3) marginal, (always in an extrorse 

 marginal furrow) 



(b) Sori indusiate, superficial, (linear, ob- 



long, or rotundate). 



(a) Indusium bursting along its out- 

 ward margin, attached interiorly 



() Indusium bursting along its in- 

 ward margin, attached exteriorly. 



Eeceptacles resupinate, i.e., the spore- 

 cases attached on the under surface of 

 theindusium 



Eeceptacles normal, i.e., the spore-cases 

 attached to the surface of the frond 



punctiform 



linear, transverse 



(c) Eeceptacles short, transverse, or arcuate 



on the venules, sub-parallel with the mid- 

 rib or margin. 



(a) Sori indusiate 



(5) Sori non-indusiate 



(2) Sori parallel with the venation, oblique 



(rarely sub-parallel) to the midrib, oblong 

 linear or more or less elongated, some- 

 times compound. 



(a) Sori indusiate, lateral or sub-lateral on the 

 veins 



5. 

 Tsenitideae. 



6. 

 Vittarieae. 



7. 

 Lindsseese. 



8. 

 Adianteae. 



9. 

 Cheilantlieae. 



10. 

 Pterideae. 



11. 

 Woodwardies 



12. 

 Meniscieae. 



13. 

 Aspleniese. 



