BY THE SELECTION OF SOMATIC VARIATIONS. 



29 



greater frequency than that of the pattern green-yellow spotted-red 

 blotched. Of the bud variations one was a loss of yellow, one gave 

 increase of yellow to type green-yellow-red blotched and one was a loss 

 of red. 



Plants with green-red blotched pattern. The apparently complete loss 

 of yellow, giving only green subepidermal tissues, was a frequent bud 

 variation in plants having green-yellow, yellow-green, or green-yellow 

 spotted patterns, regardless of the degree of red in the epidermis (fig. 5) . 

 The condition of pure green also developed as a fluctuation on plants 

 of these same types. In cases the fluctuation was quite general for the 

 entire plant, while in others it occurred irregularly, giving plants with 

 mixed patterns. 



The 90 plants included in this summary are, however, selected stock, 

 all descended from cases of bud variation similar to that of figure 21, 

 in which the part concerned showed no trace of yellow in any leaves. 



TABLE 5. Summary of plants ivith green-red blotched pattern (fig. 5). 



Selections for further generations were made from plants that had 

 remained uniformly pure green. The type was maintained by selection 

 quite as it is practiced in a herd of dairy cattle. In the case of clone 13, 

 6 generations were grown, all descended from the pure-green branch of 

 the parent plant, No. 1. 



Of the total number of plants in this group, 31 remained pure green, 

 showing no trace of yellow by either fluctuation or bud variation. 

 In addition, 14 of the 15 plants with bud variations were otherwise 

 constant for the pure-green condition. All of these plants were grown 

 during an entire summer. 41 plants developed varying amounts of 

 yellow in scattered areas, making a pattern classed as green-yellow 

 spotted-red blotched. In 11 of these the yellow spotted condition was 

 quite uniform and typical and from these were selected parents for 

 the plants of subclone 13 given in the table 3. Three plants also gave 

 fluctuations in leaf-shape to the laciniate type and their progeny are 

 included in the summary of table 4. Four plants gave decidedly 



