LUTHER BURBANK 



scores of other plants of similar nature have given 

 like results, but need not be specifically mentioned 

 here. 



The thyme also I have grown from the seed, 

 and have noted with this as with other members 

 of the family a very marked tendency to variation. 

 The most interesting variety that I have developed 

 has been produced by selection from a seedling 

 the leaves of which showed a beautiful white 

 center with very uniform edges of a dark green, 

 instead of the usual yellow and green markings. 



This plant, in addition to its beautiful leaf, was 

 a more compact grower than the old variegated 

 thyme. By selecting through successive genera- 

 tions I accentuated and fixed the novel leaf until 

 it would come almost uniformly true from the 

 seed. I offered this new ornamental variety to a 

 dealer, but he responded that the demand for 

 thyme was so small as not to justify its purchase. 

 So the new plant was allowed to drop out of 

 cultivation. 



THE MUSTARD FAMILY 



The members of this family, quite unrelated 

 botanically to the ones we have considered, illus- 

 trate the tendencies of different races of plants to 

 adopt similar expedients in furthering their ends. 



Being succulent herbs, like the parsleys and 

 mints, the mustards have devised a similar pro- 



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