D 



FIG. 266. A, Upper part of a fertile shoot of E. telemateia, X i ; B, 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. 



