HOWARD, HOWARD AND ABDUR RAHMAN. 



305 



on its right side behind the head, and it regularly effected cross- 

 pollination. 



It was observed at Piisa in plots raised from local seed 

 that, while the great majority of the plants have blue flowers and 

 breed true, nevertheless a few plants occurred with pink and some- 

 times reddish flowers. 



Ten single plants obtained from a culture raised from pink 

 flowered plants in 1908 were selected in the harvest of 1909 and 

 sown the following October. In 1910 nine of these plants split 

 up as follows : — 



Single plants sown in 1909. 



10 



Plant with blue flowers. 

 Plant with pink flowers. 



Do. 



Plant with light pink flowers. 

 Do. 



Plant with blue flowers. 



Plant with red flowers. 



Plant with blue flowers. 



Do. 

 Plant with red flowers. 



Progeny in 1910. 



Flowers blue (22). 

 .Flowers pink (9). 



(Flowers blue 1 ._> 



Flowers blue with a pink borderj*''' 

 Flowers pink (12). 



pink (12) 



Flowers blue ] 



Flowers blue with a pink border j 

 Flowers pink (28). 



Flowers blue (2). 

 Flowers light pink (20). 



Flowers blue (3). 

 Flowers light pink (23). 



4). 



(Flowers blue 



)lue with pink border) .., ox 

 ,, without border (^" ''■ 



i Flowers light pink (8). 

 'Flowers pink (I). 



TFlowers red (33). 

 \ Flowers blue (1). 



/Flowers red (6). 

 > Flowers blue (22). 



/Flowers red (5). 

 \Flowersblue(23). 



Flowers all red. Progeny in all respects like the parent. 



Thus nine out of ten single plant cultures split and proved to 

 be natural crosses. Only one red flowered plant bred true. In 

 addition to the differences in the colour of the flowers there were 

 slight differences in the colour of the seeds of the progeny of the 

 crossed plants. 



