CORDAITALES 167 



Bennettitales or Cycadales, there should be some hesitation in as- 

 serting that some particular leaf must belong to the Cordaitales. 



All investigators agree that the group can be recognized with 

 certainty from the lowest Carboniferous (Culm) through the lower 



Fig. 1 78. — Dorycordaites sp. : restoration showing stem, leaves, roots, and fructifica- 

 tion. Scott's modification of Grand d'Eury's figure is principally a shortening of the 

 trunk, which would have required a couple more pages to show it on the same scale as 

 the roots and the branching top. — After Grand d'Eury and Scott.s^j 



Permian (Rothhegendes), with its greatest development in the 

 Pennsylvanian. 



Geographically, the distribution was world-wide in the Carbonif- 



