— n6— 



Tribe 6. Lomaries. — Sori dorsal, transverse, linear, 

 sub-costal ; indusium exterior, of the same shape as 

 the sorus. 



Genera : Blechnum, Lomaria, Woodzvardia. 

 Tribe 7. Asplenie^e.— Sori linear or oblong, dorsal 

 along the veins, single or double ; indusium linear 

 or oblong. 



Genera: Asplenium, Athyrium, Camptosorus, 

 Scolopendrium. 



Tribe 8. Aspidies. — Sori dorsal, terminal on the 

 veins, round or reniform ; indusium peltate or reni- 

 form. 



Genera: Aspidium, N ephr odium, Nephrolepis. 

 Onoclea, Polystichum, StrutHi'opteris. 



Tribe 9. Polypodies. — Sori round or oval, dorsal 

 or terminal on the veins ; indusium absent. 

 Genera: Phegopteris, Poly podium. 



Tribe 10. Grammatide^e. — Sori arcuate, oblong or 

 linear, often reticulated, usually dorsal ; indusium 

 absent. 



Genera : Meniscium, Gymno gramma. 



Tribe 1 1. Vittaries. — Sori linear, costal or sub- 

 marginal, sunk in a groove, or superficial. 

 Genera : Tcenitis, Vittaria. 



Tribe 14. Acrostiches. — Sori without ' definite 

 form, usually covering the underside of the pinnae. 

 Fronds usually dimorphous. 

 Genus : Acrostichum. 



