Mutations ui Other faniilies. 



295 



The leaves of O. gigas are recognizable by their 

 greater breadth ; all of the others that are figured are 

 narrower than 0. Lamarckiana. The leaf of 0. oblunga 



Fig. 54. Leaves from the stems of flowering plants of 

 g, O. gigas; r, O. rubrinervis ; o, O. oblonga; a, O. albida; 

 s, O. scintillans. 



is characterized by its broad median vein ; that of O 

 rnbrinerz'is is slightly more pointed than gigas and ob- 

 longa ; moreover its surface is usually \cr\- uneven. But, 



