Gates, Tetraploid Mutants and Chromosome Mechanisms. 



125 



A more interesting departure, which must, I think, be classed 

 as a bud mutation, was observed in No. I, 4. This plant was 

 typical of the culture, but bore basal side branches having decidedly 

 smaller flowers and leaves (cf. table II), the former being about 



Fig. 7. 0. gigas deVries, Amsterdam. Cult. m / ]9 . Same plant as fig. G, Aug. 20. 



the size of those in Lamarcldana. It seems reasonable to consider 

 this a mutative bud reversion, though I have not yet counted the 

 chromosomes. 



A third culture of yiyas which I grew r during the last season, 

 was derived from pure seeds received from de Vries several years 

 ago. Only one germinated this year, and it proved to be a very 



