A BEALTIFUL EXAIMPI E OF SOMATIC MUTATION 



Normally this sunflower is solid chestnut red. Some change has apparently taken place 

 in the constitution of part of the cells which formed this flower, with the result that the 

 red has been replaced liy yellow in three rays. (Fig. 10.) 



the yellow runs down the middle of a 

 ray. On the other side, the first red 

 ray has a little jnire yellow on one side 

 of the tip. 



Last year I found a head with the 

 rays orange, exeejjt that three were 

 red, and on each side of the three was 

 a ray exactly half red and half yellow, 

 the red side, of course, toward its red 



neighbor. Other heads on the same 

 ])lant, though not all, showed more or 

 less of the same character. Another 

 plant in 1916 had three heads in which 

 about half (one side) of the rays were 

 quite strongly red, the other half with 

 little red. The three heads were not 

 quite alike, one having over half the 

 rays strongly red. Another remarkable 



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