162 Observation of the Origin of Varieties. 



will always find between the tongue florets, more or less 

 numerous tubular florets which are hidden from view by 

 the others. Moreover, the degree of doubling is to a 

 considerable extent subject to fluctuating variability; one 

 plant has more and another fewer, transformed florets. 



Fig. 28. Clirysanthcmnm inodorum plcniss'nnum. A plant 

 with a high degree of doubling in the inflorescences, and, 

 consequently, perfectly sterile. 



This is an important point, for the white tongue florets 

 of C. inodorum plenissimmn are female and inflorescences 

 such as those shown in Fig. 28 and Fig. 34C on page 184 

 set absolutely no seed. The variety is therefore main- 



