David Starr Jordan 



and hybridization save time by the increase of the 

 rate or degree of variation. There is, however, 

 no evident hmit to the results to be obtained by 

 simple selection. New and permanent species of 

 wheat have, without a shadow of doubt, been pro- 

 duced by selection alone. 



In the California poppy (Eschscholtzia califor- 

 nica), stripes of crimson are never seen on the 

 inside. Mr. Burbank once found a seedling in 

 which the outside crimson had struck through like 

 a crimson thread which had been misplaced. In 

 other generations, by selection, this red was more 

 and more increased, until finally out of it is devel- 

 oped a crimson poppy, of which Mr. Burbank 

 has now many specimens, seeding more or less 

 true to the type. The ' Shirley ' poppy (Papaver 

 rhceas) is well on the way to blue by selection. 



It is questioned whether competition in minor 

 details, or ' intra-specific selection,' can form 

 species permanent as wild species are. As to this, 

 Mr. Burbank notes that the cultivated species pro- 

 duced after the fashion of his crimson eschscholtzia 



7 



