CONTRASTING TYPES OF 

 CACTUS 



At the left, a colony of the spine- 

 less cactus called the "Tapuna?*; at 

 the right a quite different type called 

 the "Tuna" Like all any spineless cac- 

 tuses, these are crossbred seedlings; and 

 they are of closely similar lineage, not- 

 withstanding their widely different ap- 

 pearance. An instance of the segrega- 

 tion of hereditary characters. 



