GENEEA OP BEENS: 



[c] Eficeptacles local, &o., continued. 



(1) Sori transTerse to the veins, &o., continued. 



(b) Eeceptaoles marginal or sub-marginal, 

 (rarely medial) always remote from the 

 midrib, usually linear; sometimes ob- 

 long or punctiform. 

 (a) Son non-iudusiate, (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) 

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

 long, or rotundate). 



(a) Induaium bursting along its out- 

 ward margin, attached interiorly 



(;3) Indusium bursting along its in- 

 ward margin, attached exteriorly. 



Eeceptacles resupinate, i.e., the epore- 

 casea attached on the under surface of 

 the indusium ... 



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 



(J) 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. 

 Tseuitidese. 



§ 6. 

 VittariesB. 



Lindsseese. 



§8. 



Adiantese. 



§ 9. 

 Cheilautheae. 



§ 10. 



Pteridese. 



woodwardieae. 



§ 12. 



Menisciese. 



§ 13. 



Aspleniese. 



