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ORLAND E. WHITE 
corolla except at their bases, and, in such cases, other factors have 
interfered and effected a distinct separation. The anomalous char- 
acter, then, is the result of imperfect fusion of the corolla segments 
in ontogeny. This theory is further supported by the relation that 
exists between the number of normal corolla lobes and the number of 
Fig. 3. " Catacorolla." Nicotiana flowers from the parent plant of the -4-1A 
race, showing variation in the expression of the anomaly. 
extra-corolla segments. Table 5 shows the character of this relation- 
ship in 28 flowers taken from the original parent (-4-1 A). 
Table 5 
Number of segments per flower i 2 3 4 5 6 
Number of flowers 3 2 6 9 5 3 
i 
