A. 



Fig. 266. — A, Upper part of a fertile shoot of E. tclemateia, X i ; T?, lower part of a 

 vegetative shoot, with young branches for the next season's growth, X i ; T, tubers; 

 C, cross-section of an internode of the fertile shoot, X4; L. cortical lacunae; D, 

 sporangiophores, X4; E, median section of a single sporangiophore, X6; sp, 

 sporangia. 



