213 



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Receptacle at the junction of the veinlets 

 or at the apex of free veinlets. 



Genus XXX. Aspidium Schott 128 



As the Aspidium but only the lowest 

 veinlets of the vein anastomosing so as to 

 form a series of areoles near the costa 

 without any free veinlets within them. All 

 the other veinlets as a rule free. Sori 

 generally at the apex of the free veinlets, 

 sometimes on the netted veins. 



Gems XXXI. Pltociemia Presl. 134 



Sori somewhat round on the back or on 

 the apex of veinlets. 



Indusium kidney-shaped attached by 

 the sinus. Veins all free. Fronds pinnate 

 or compoundly 2-4 pinnate. 



Gems XXXII Lastrea Presl. 137 



Sori round ; indusium kidney-shaped 

 (often like that of Athyrium or Asplenium 

 in N. subpcctinatum), sometimes absent. 

 Veins pinnate, one or more of the lower 

 veinlets anastomosing at an angle with 

 corresponding ones of the next group, 

 producing trom their junction an ex- 

 current veinlet which is either free or 

 joined in the angle of the next superior 



