114 



THE SURVIVAL OF THE UNLIKE. 



[IV. 



caunot attach any such suspicion as a knowledge of 



their origin. These are what 

 botanists call good species. 

 These species agree in hav- 

 ing a weak and spreading 

 habit of growth, much like 

 the common tomato. The 

 features by which they differ 



C. Spray of tho large-leaved tomato. 



amongst themselves, that is, the 

 specific characters, are founded 

 chiefly upon the manner of di- 

 visions of the leaves, the shape 

 of the leaflets, the character of the 

 flower cluster and the relative hairiness 

 or smoothness of the parts. If one 

 applies these same tests in the same 

 degree to the two modern offshoots of 

 the tomato — the Upright and the Mi- 

 kado types — he will find that these 

 offshoots differ as much or even more 

 from each other and from their own 



I>. Leaf of the large- 

 leaved tomato. 



