Studies of Teratological Phenomena. 



87 



In addition to the increase in number of parts, the floral structures 

 are subject to many minor abnormalities. The first flowers to bloom 

 on a plant are much more abnormal than those appearing later. Because 

 of this, all data on the abnormal flowers of a family have been taken 



a b 



Fig. 11. 

 a Nicotiana 300 — .309 (fasciated). 

 b Nicotiana 402 (normal). 



as nearly as possible at the time when all the plants were approximately 

 in the same blooming stage. These early flowers were often so split 

 (dialysis) and deformed as to lose all semblance of belonging to any 

 regular -flowered family such as the Solanaceae. The later flowers, 

 though generally possessing as many floral leaves as the earlier ones, 

 were usually as symmetrical as those of the normal 402 (Fig. 11). 



