Chap. V. 



LIMNANTHES DOUGLASII. 



145 



show a slight advantage over their opponents. When grown to 

 a considerable -height the eight tallest crossed plants averaged 

 44 "43, and the eight tallest self-fertilised plants 37*34 inches, 

 or as 100 to 84. When their growth was completed they were 

 again measured, as shown in the following table : 



Table L. 



Tropceolum minus. 



The eight tallest crossed plants now averaged 58-43, and the 

 eight tallest self-fertilised plants 46 inches in height, or as 100 

 to" 79. 



There was also a great difference in the fertility of the two 

 lots which were left uncovered in the greenhouse. On the 17th 

 of September the capsules from all the plants were gathered, 

 and the seeds counted. The crossed plants yielded 243, whilst 

 the same number of self-fertilised plants yielded only 155 seeds, 

 or as 100 to 64. 



LlMNANTHES DOUGLASII. 



Several flowers were crossed and self-fertilised in the usual 

 manner, but there was no marked difference in the number of 

 seeds which they yielded. A vast number of spontaneously self- 

 fertilised capsules were also produced under the net. Seedlings 

 were raised in five pots from the above seeds, and when the 

 crossed were about 3 inches in height they showed a slight 

 advantage over the self-fertilised. When double this height, the 



