CHAP. IV. ESCHSCHOLTZIA CALIFORNIOA. Ill 



the cases which follow that this result was accidental, owing to 

 only a few plants having been measured, and to one of the 

 self-fertilised plants having grown only to a height of 15 inches. 

 The plants had been kept in the greenhouse, and from being 

 drawn up to the light had to be tied to sticks in this and the 

 following trials. They were measured to the summits of their 

 flower-stems. 



The four crossed plants here average 29 ' 68 inches, and the 

 four self-fertilised 25 '56 in height; or as 100 to 86. The 

 remaining seeds were sown in a large pot in which a Cineraria 

 had long been growing ; and in this case again the two crossed 

 plants on the one side greatly exceeded in height the two self- 

 fertilised plants on the opposite side. The plants in the above 

 four pots from having been kept in the greenhouse did not 

 produce on this or any other similar occasion many capsules ; 

 but the flowers on the crossed plants when again crossed were 

 much more productive than the flowers on the self-fertilised 

 plants when again self-fertilised. These plants after seeding 

 were cut down and kept in the greenhouse; and in the 

 following year, when grown again, their relative heights were 

 reversed, as the self-fertilised plants in three out of the four 

 pots were now taller than and flowered before the crossed 

 plants. 



Crossed and self-fertilised Plants of the Second Generation. The 

 fact just given with respect to the growth of the cut-down 

 plants made me doubtful about my first trial, so I determined 

 to make another on a larger scale with crossed and self-fertilised 

 seedlings raised from the crossed and self-fertilised plants on 

 the last generation. Eleven pairs were raised and grown in 

 competition in the usual manner; and now the result was 

 different, for the two lots were nearly equal during their whole 

 growth. It would therefore be superfluous to give a table of 

 their heights. When fully grown and measured, the crossed 

 averaged 32 -47, and the self-fertilised 32 '81 inches in height; 

 or as 100 to 101. There was no great difference in the number 

 of flowers and capsules produced by the two lots when both 

 were left freely exposed to the visits of insects. 



Plants raised from Brazilian Seed. Fritz Mullersent me from 

 South Brazil seeds of plants which were there absolutely 

 sterile when fertilised with pollen from the same plant, but 

 were perfectly fertile when fertilised with pollen from any 

 other plant. The plants raised by me in England from these 



