this were the case it could not be possible that a portion of the bud, which 

 produces the variant, continued to belong to C. adami itself. 



Hence it follows that the bud-variant is not produced by variation of a single 

 cell but by that of a cell-group. 



Fig. 2. 



One year's purpureus, ps, sprung as a bud-variant, from a dormant adami-bud, at the 

 extremity of a short-shoot ad. On the left a long-shoot of adami, at the 



extremity of a short-shoot. 



To show that also the purpureus- variant is produced by the variation of an 

 already constituted adami-meristem, and not of a single cell, far-back in the evolution 

 of that meristem, I refer to Fig. 2. 



Here we see a one year's purpureus-shrub (J>s) placed at the extremity of a 

 short-shoot of Cytisus adami 1 }. Commonly the purpureus- variants, quite like those of 

 laburnum, spring from comcom buds, whence the exact moment of their birth is 

 not clear. But the peculiarity of the case figured here is that the short-shoot, 

 terminating in purpureus, had already grown for a number of years as adami, and 

 that consequently it is not possible to doubt, that purpureus has come forth from 

 the whole adami-meristem. As this meristem is pluricellular, the cause, which led to 

 produce the purpureus-\&\\m\., must thus also have affected a cell-group and not 

 have been confined to a single cell. 



') A short-shoot consists of a closely crowded succession of nodes, between which 

 the internodes are not developed; they grow very slowly and point to unfavorable 

 conditions of nutrition. 



