VENATION 



97 



Fig. 93. Examples of nervation in leaves of Ferns. a = Nervatio Caenopteridis (sterile leaf of Ela- 

 phoglossum peltatum). Nat. size; b = Nervatio Taeniopleridis {pSiXi oi itxtileiXezi oi Scolopendrmm 

 vidgare). X2; c— ISfei-dutio Sphettopteridis (primary segment of Asplenimn adiantum nigrum). 

 Nat. size; d=Nei~vatio Etipteridis (fertile pinna of Polypoditim vidgare). Nat. size; e= Nervatio 

 Neuropteridis (fertile segment of Pteridiiiin aqtiilinuiii). Nat. size; /= Nervatio Fecopteridis (part 

 of segment oi Dryopteris Filix-mas). Nat. size; g~Nervatio Goiiiopteridis (part of segment of 

 Meniscium retiailatum). Nat. size; h = Nervatio Goniopteridis (part of segment of Aspleiiium 

 esculentum). Nat. size; i—Nei-vatio Goniophlebii (part of segment of Polypodiiim neriifoliwn). 

 Nat. size. (After Luerssen.) 



