132 



LTCOPODIALES 



[CH. 



specimen the continuation of the ring is seen as a prominent 

 cone fitting into the cup-like depression in the obverse half: the 



oe2. 



Tr. St. 



Fig. 158. Diagrammatic section through the base of a branch to illustrate the 

 Branch theory of the Ulodendroid scar. (After Watson.) 



conical cast shows that numerous small vascular strands were 

 given off from this ring of tissue, and these strands have the 



