142 



OSMUNDACEAE 



[CH. 







*«^) 



■^KtiiiA 



■« 



^■ 



'-^/" 

 ^ 



Fig. 431. Osmundites Carnieri Schuster. Arrangement of meristeles. 

 The endodermis is shown by dotted lines. (After Kidston and 

 Gwynne-Vaughan.) 



Fig. 432. Diagrams illustrating the departure 

 of the leaf-trace in Thamitopteris Schlechte>i- 

 dah'i Eich. (After Gwynne-Vaughan.) (Com- 

 pare text.) 



