100 



BRASSICA OLERACEA. 



Chap. IV 



plants had grown much bulkier, and had begun to form 

 heads. The crossed had now acquired a marked superiority 

 in general appearance, and averaged 8*02 inches in height, 

 whilst the self-fertilised averaged 7 ' 31 inches ; or as 100 to 91. 

 The plants were then turned out of their pots and planted 

 undisturbed in the open ground. By the 5th of August their 

 heads were fully formed, but several had grown so crooked that 

 their heights could hardly be measured with accuracy. The 

 crossed plants, however, were on the whole considerably taller 

 than the self-fertilised. In the following year they flowered ; the 

 crossed plants flowering before the self-fertilised in three of the 

 pots, and at the same time in Pot II. The flower-stems were 

 now measured, as shown in Table XXIX. 



Table XXIX. 

 Measured to tops of Flower-stems ; signifies that a Flower-stem 



was not formed. 



The nine flower-stems on the crossed plants here average 41 08 

 inches, and the nine on the self-fertilised plants 39 inches in 

 height, or as 100 to 95. But this small difference, which, more- 

 over, depended almost wholly on one of the self-fertilised plants 

 being only 20 inches high, does not in the least show the vast 

 superiority of the crossed over the self-fertilised plants. Both 

 lots, including the two plants in Pot IV., which did not 

 flower, were now cut down close to the ground and weighed, but 



