284 



CORDAITEAE 



[CH. xxxm 



is often torn into strips (fig. 485, A) ; the approximately rectangular 

 leaf has a broad elliptical base 9 10 x 3 4 cm. 



FIG. 485. Titanophyllum Grand' Euryi. A, leaves ^ nat. size; B, stomata on 

 the lower surface of the lamina. (After Renault and Zeiller.) 



Dr White 1 describes a specimen from the Lower Coal Measures 

 of Missouri as ? Titanophyllum Brittsii which he speaks of as the 

 thick base of a leaf similar to that described by Renault but, as 

 White says, no formal diagnosis is possible without more satis- 

 factory material. Such evidence as is available suggests that 

 Titanophyllum is a type of Cordaitalean leaf probably closely 

 allied to Cordaites. 



1 White (99) B. p. 271. 



