120 THE GEOLOGICAL HISTORY OF PLANTS. 



I 



Fig. 43. — Zepidodemlron corruffotum, Dawson, a tree charaoteristie of the 

 Lower Carboniferous, a, Eestoration. b. Leaf, natural size, o. Cone 

 and branch, d, Branch and leaves, e, various forms of leaf-areoles. 

 r, Sporanaium. i, x., m. Bark, witli leaf-scar.s. if, Bark, with leaf- 

 Bcars of old! stem, o, Decorticated stem {Knorria). 



