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but one or mere or less connected by 

 arching veins at the very base. 



Genus XV. Pteris L 80 



Fronds triangular or halberd-shaped or 

 palmately divided ; veins copiously anas- 

 tomosing, without free included veinlets. 

 The rest as in Pteris. 



Genus XVI. Doryopteris J. Smith 94 



Veins copiously anastomosing with free 

 included veinlets. The rest as in Pteris. 



Genus XVII. Lithobrochia Prtsl. 95 



.Fertile fronds with the segments forked 

 and pod-shaped. Sori linear, marginal, 

 almost parallel. Veins of sterile frond 

 transversely elongated and distantly anas- 

 tomosing. Genus XVIII. Ctratopttris Broag. 96 



TRIBE VII. BLECHNE^E 



Sori linear, oblong, parallel with the 

 midrib and margin, nearer the midrib ; 

 indusium linear, opening towards the 

 midrib. 



Sori linear, mostly continuous, parallel 

 to and quite close to the midrib ; veins 

 free. Genus XIX. Biechnum L. 97 



