184 Observation of the Oriyin of Varieties. 
the midst of the tubular florets (Fig. 34A) ligulate florets 
are developed (Fig. 34B). If the "doubling" 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 
Fig. 34. Chrysanthemum inodorum plenissimum. A, in- 
florescence with central disc of tube florets (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. 
