184 Observation of the Origin of Varieties. 



the midst of the tubuhir llorets (Fig. 34A) Hgulate florets 

 are developed (Fig. 34B). If the ''doubhng" is carried 

 very far the former are completely covered by the latter 

 (Fig. 34C), and can only be seen by pulling out the 

 ligulate florets or by turning them aside. If this is done 

 a large number (and not merely a few scattered ones, as 

 might perhaps be expected) of tubular yellow corollas 



Fi<? 



34. Chrysanthemum inodorum plcnissimum. A, in- 

 Horescence with central disc of tube tlorets (fertile) ; 

 B, with scattered tongue-florets in the disc (half fer- 

 tile) ; C, highest degree of "doubling" (sterile). 



are ordinarily found ; and the less the amount of doubling 

 the more conspicuous they are. Moreover we often find, 

 in both species, inflorescences with a broad yellow disc 

 over which occasional white ligulate florets are scattered 

 (Fig. 34 B). Such flowerheads look like anomalies, 

 though, as a matter of fact, they are less anomalous 

 than the apparently completely "double" forms. 



